Bandpass or bandstop filters with adjustable bandwidth and fixed centre frequency (H03H7/12)

Interference suppressor // 2642808
FIELD: physics.SUBSTANCE: invention is designed to isolate signals of moving targets against the background of passive interference during the group rearrangement of the carrier frequency of the probing pulses. Interference suppressor includes the first and the second delay units, a weighting coefficient unit, the first and the second complex multipliers, a weight block, a complex adder, a complex conjugation unit, a switching unit, an accuracy unit, a wiring unit and a two-channel switch interconnected in a certain way and carrying out a coherent processing of the original samples. The signal from the moving target and passive interference, significantly exceeding the useful signal in the quadrature phase detectors, is transferred to the video frequency and converted in such a way that the interference residues are compensated.EFFECT: increasing the signal extraction efficiency of moving targets.11 dwg

Computer for improvement of interference // 2628904
FIELD: physics.SUBSTANCE: interference suppressor includes first and second delay units, a weighting unit, a first and second complex multipliers, a weight block, a complex adder, a complex conjugation unit, a switching unit, an accuracy unit, a switching unit, a two-channel switch and a synchroniser, and carrying out the coherent processing of the original samples.EFFECT: increasing the efficiency of signal extraction of moving targets.11 dwg

Adaptive band-stop filter // 2579998
FIELD: radar and radio navigation.SUBSTANCE: invention is intended for separation of signals of movable targets on background of passive jamming at wobbling repetition period of sounding pulses. Said result is achieved by adaptive rejection filter includes the first, second and third main delay units, first, second and third complex multipliers, a unit for measuring phase, the main weight unit, a unit of weight coefficients, main adder, a clock generator, first and second additional delay units, extra adder, an additional weight unit and a switch, connected to each other in a certain manner and which perform coherent processing of initial readings.EFFECT: technical result consists in improvement of efficiency of extraction of signals of movable targets.1 cl, 15 dwg

Harmonic filter of short-wave transmitter // 2560792
FIELD: radio engineering, communication.SUBSTANCE: harmonic filter of a short-wave transmitter includes N LC filters switched as to input and output by means of input and output switches, each of the above filters includes the first and the second inductance coils in longitudinal arms, which are connected to each other, and a capacitor connected between the connection point of inductance coils and a common bus, as well as a capacitor of variable capacity, which is common for all LC filters, and to each LC filter there introduced is an additional inductance coil connected parallel to the capacitor and simultaneously connected to the capacitor of variable capacity through one of N additionally introduced switches, and the first inductance coil in each LC filter is inductively connected to the second inductance coil; with that, magnetic fluxes of the inductively connected inductance coils are directed towards each other.EFFECT: providing coordination within the whole working range of frequencies of a radio transmitter at simplification of adjustment processes.2 cl, 1 dwg

Highly selective narrow-band lc-filter // 2519492
FIELD: radio engineering, communication.SUBSTANCE: invention pertains to radio electronics and can be used for frequency selection of signals. The highly selective narrow-band LC-filter comprises two structurally identical band-pass filter links, each consisting of three capacitors and an inductance coil, eleven capacitors, two inductance coils, an input and an output potential terminal and a common bus.EFFECT: high selectivity of the filter.6 dwg

Tunable band-pass lc-filter // 2516707
FIELD: radio engineering, communication.SUBSTANCE: tunable band-pass LC-filter comprises a low-pass filter which consists of first, second and third inductance coils, a first capacitor, a band-pass circuit consisting of a fourth inductance coil, a fifth inductance coil, a sixth inductance coil, a second capacitor which is connected to the output of the band-pass circuit, as well as a seventh and eight inductance coil, first and second varicaps, wherein the seventh inductance coil is connected by one terminal to the input potential terminal, and by the second terminal to a common bus, the eight inductance coil is connected to the output of a low-pass filter, the second terminal of which is connected to the output potential terminal of the device, the first varicap is connected in parallel to the first capacitor, the second varicap is connected in parallel to the second capacitor.EFFECT: high selectivity and broader functional capabilities by enabling frequency tuning.8 dwg

Band-pass lc filter with reflection compensation in stop-band // 2513764
FIELD: radio engineering, communication.SUBSTANCE: disclosed device relates to radio electronics and can be used as input selecting circuits of professional-grade radio receivers. The band-pass LC filter with reflection compensation in the stop-band, having multiple cascade-connected links with an identical structure, each having a first inductance coil, the first lead of which is the input of the link, the second lead being connected to a first capacitor, the second lead of which is connected to second and third capacitors, the second lead of the second capacitor is connected to a common bus, the second lead of the third capacitor is connected to a second inductance coil, the second lead of which is the output of the link, wherein the first lead of the first inductance coil of the first link is connected to a fourth capacitor and a third inductance coil, wherein the second lead of a fourth capacitor is connected through a first resistor to the common bus, and the second lead of the third inductance coil is connected through a second resistor to the common bus.EFFECT: improved standing wave ratio at the input of the band-pass circuit in stop-bands.4 dwg

Band-pass lc filter with constant input resistance in stop-bands // 2513762
FIELD: radio engineering, communication.SUBSTANCE: disclosed device relates to radio electronics and can be used as selectors of professional-grade transceivers. The band-pass LC filter with constant input resistance in stop-bands comprises a first inductance coil, the first lead of which is connected to the input potential terminal of the filter, the second lead of the inductance coil is connected to a first capacitor, the second lead of which is connected to second and third capacitors, the second lead of the third capacitor is connected to a second inductance coil, the second lead of which is connected to fourth and fifth capacitors, the second lead of the fifth capacitor is connected to a third inductance coil, the second lead of which is the potential output of the filter, the second leads of the second and fourth capacitors are connected to a common bus; the device also comprises an additional circuit which consists of a fourth inductance coil, the first lead of which is connected to the input potential terminal of the filter, the fourth inductance coil is connected in parallel to a sixth capacitor, the second lead of the fourth inductance coil is connected to a resistor and a fifth inductance coil, the second lead of which is connected to a seventh capacitor, the second leads of the seventh capacitor and the resistor are connected to the common bus.EFFECT: improved standing wave ratio at the input of the filter in stop-bands.6 dwg

Highly selective second-order lc bandpass filter // 2501156
FIELD: radio engineering, communication.SUBSTANCE: highly selective LC bandpass filter has two inductors and eight capacitors which are connected so as to form two links, the first link providing an attenuation terminal lower than the medium frequency and the second link providing an attenuation terminal higher than the medium frequency.EFFECT: high selectivity of the filter by realising two attenuation terminals at end frequencies and improving squareness of the attenuation characteristics.5 dwg

ultiband tunable lc bandpass filter // 2496226
FIELD: radio engineering, communication.SUBSTANCE: multiband tunable LC bandpass filter has two structure-identical bandpass circuits, each consisting of two inductance coils and three capacitors; the input and output of each of the circuits are connected through electronic switches on both inductance coils to an amplifier, eight signal lines, between which, through corresponding electronic switches, are connected corresponding multiple sections of three inductance coils or three capacitors.EFFECT: high squareness ratio of the amplitude-frequency curve, high level of attenuation in the stop band, broader functional capabilities.1 dwg

Tunable rejection lc filter // 2495523
FIELD: radio engineering, communication.SUBSTANCE: device includes a low-pass filter consisting of N structurally identical links, each link consisting of an inductance coil, the first lead of which is the input of the link, the second lead is the output of the link; each of the leads of the inductance coil is connected to a capacitor; the second leads of the capacitors are connected to a common bus, wherein two loops are further included, each consisting of parallel-connected capacitor and inductance coil; also additionally included are first, second, third and fourth signal lines; the second signal line is connected to a first group of M electronic switches; the second lead of each electronic switch is connected to a capacitor; the second leads of the capacitors are connected to the first signal line, and the third signal line is connected to a second group of M electronic switches; the second lead of each of the electronic switches is connected to a capacitor; the second leads of the capacitors are connected to the fourth signal line.EFFECT: providing an electronically tunable rejection band in the operating frequency band.2 dwg

Active piezoelectric band-stop filter // 2486664
FIELD: radio engineering, communication.SUBSTANCE: active piezoelectric band-stop filter has a differential amplifier, two piezoelectric resonators, two resistors and a capacitor.EFFECT: wider rejection band.1 dwg

Band-pass lc-filter with rejection of concentrated interference in service frequency band // 2469468
FIELD: radio engineering.SUBSTANCE: band-pass LC-filter includes the first and the second low-pass filters, the first and the second group of inductance coils, high-pass filter, amplifier, electronic switches and discrete capacitors of variable capacity.EFFECT: improving operating characteristics of the device, increasing the width of rejection band, increasing the attenuation level in stop band, enlarging the service frequency band and reducing KCB (standing-wave ratio).1 dwg

Frequency-selective system // 2429559
FIELD: radio engineering.SUBSTANCE: device includes common bus, potential input terminal connected to the first output of inductance coil (IC) (2) the second output of which is connected to the first output of capacitor (C) (3) and the first outputs of two input piezoelectric resonators (PR) (4,5) the second outputs of which are connected to inputs of differential amplifier (DA) (7), and the second output of C (3) is connected to common bus. System includes M links; each link includes two output PR (12-19) and one operating amplifier (OA) (8-11). The first output of PR (12-19) is connected in each link to each input of OA, the second outputs of PR are combined in pairs and connected to each other, the second output of PR of odd-numbered links are connected to the first output of DA (7), and the second outputs of PR of even-numbered links are connected to the second output of DA (7). Output of each OA (8-11) is connected to the first output of the first C (20-24), the second output of which is connected to the first output of the second C (21, 25, 29, 33) and to the first output of IC (22, 26, 30, 34), the second output of the second C (21, 25, 29, 33) is connected to common bus, and the second output of IC (22, 26, 30, 34) is connected to separate potential output terminal of the device.EFFECT: reduction of non-uniformity of amplitude-frequency characteristic in band-pass filters adjacent as to frequency band.1 dwg

ethod and device of video processing, and recording medium that stores program // 2408159
FIELD: information technologies.SUBSTANCE: target image that forms video image is divided into multiple division areas (DA); pass band (PB) width applied to DA is determined; array of filtration ratios (FR) is calculated to realise frequency characteristics corresponding to limitation of band, with application of PB width; image data is filtered with application of FR array; error information value is produced between obtained data and data of initial image, and distribution ratio (DR) is calculated to be used to determine optimal width of PB, on the basis of produced value; optimal width of PB corresponding to DR is defined for each DA, and array of optimal FR is calculated to realise frequency characteristics corresponding to limitation of band, using optimal width of PB; image data of division area is filtered using array of optimal FR; and produced data of each DA are synthesised.EFFECT: generation of filtered image with specified value of image quality assessment.29 cl, 27 dwg

Band-pass tunable self-consistent lc-filter // 2402159
FIELD: electricity.SUBSTANCE: filter includes the first inductance coil to the outputs of which there connected is the second and the third inductance coil, the second outputs of the second and third coils are connected to common bus, as well as two capacitors of variable capacity, the first outputs of capacitors are connected to common bus; besides filter includes the fourth inductance coil connected to input potential terminal of filter and to the second output of the first capacitor, fifth inductance coil connected to output terminal of filter and to the second output of the second capacitor, the sixth inductance coil connected to the second output of the first capacitor and to the first output of the second inductance coil, the seventh inductance coil connected to the second output of the second capacitor and to the first output of the third inductance coil.EFFECT: improving amplitude-versus-frequency characteristics at large values of tuning range.4 dwg

Rejection filter // 2396703
FIELD: electricity.SUBSTANCE: rejection filter including two inductance coils which are in-series connected; the first output of the first one of them is connected to input potential terminal of filter; the first output of the second inductance coil is connected to output potential terminal of filter; to the second outputs of these inductance coils there connected is the first and the second capacitors, as well as the third inductance coil the second output of which is connected through the third capacitor to common bus; besides filter includes the fourth and the fifth inductance coils; at that, the fourth inductance coil is connected between input potential filter terminal and the second output of the first capacitor; the fifth inductance coil is connected between output potential filter terminal and the second output of the second capacitor.EFFECT: improving manufacturability.2 dwg

Band-pass lc-filter with controlled transmission bandwidth // 2396702
FIELD: physics.SUBSTANCE: band-pass LC-filter with controlled transmission bandwidth which consists of first and second inductor coils whose first leads are connected to a first capacitor and a third inductor coil whose second leads are connected to a common bus, also contains fourth and fifth inductor coils, second and third capacitors and two varicaps, where the fourth inductor coil is connected to the input potential terminal of the filter and the second lead of this coil is connected to first leads of the second capacitor and the first varicap. The fifth inductor coil is connected to the output potential terminal of the filter and the second lead of this coil is connected to first leads of the third capacitor and the second varicap. Second leads of the varicaps, second and third capacitors are connected to the common bus.EFFECT: control of transmission bandwidth during operation.2 dwg

Variable lc-band-pass filter // 2396701
FIELD: physics.SUBSTANCE: variable LC-band pass filter consists of n cascaded L-shaped half sections of high-pass filters, each having capacitors in a series circuit. The first lead of the capacitor is the first input of the half section and the second lead is the output which is connected to an inductor coil whose second output is connected to another capacitor. The input of the first half section is connected to the input potential terminal of the filter. The second leads of the capacitors which are connected in parallel circuits of the half sections are connected to a common bus. The output of the last half section is cascaded with m L-shaped half sections of low-pass filters, each consisting of an inductor coil and in a series circuit and a capacitor connected in parallel. The first leads of this inductor coil and the capacitor are the input of the half section and their second leads are the output which is connected to another capacitor. The output of the last half section is connected to the output potential terminal of the filter and the second leads of capacitors in the parallel circuit of the last ℓ half sections low-pass filters are connected to the common bus. k<n and ℓ<m are any integers. The invention is distinguished by that the filter has four groups of switches. The first group consists of n-k switches whose first leads are connected to input leads of half sections of the low-pass filter, starting with the k+1-th to the n-th half section respectively. Second leads of these switches are connected to the output of the high-pass filter. The second group consists of n-k switches whose first leads are connected to second leads of n-k capacitors connected in the parallel circuits of high-pass filters starting with the k+1-th half section to the n-th half section respectively. The second leads of these switches are connected to the common bus. The third group has m-ℓ switches whose first leads are connected to inputs of half sections of low-pass filters starting with the ℓ+1-th to the m-th, respectively. The first leads of these switches are connected to the output of the m-th half section. The fourth group consists of m-ℓ switches whose first leads are connected to second leads of m-ℓ capacitors connected in the parallel circuits of low-pass filters starting with the ℓ+1-th half section to the m-th half section, respectively. The second leads of these switches are connected to the common bus.EFFECT: simplification.1 dwg

Tunable band filter // 2380825
FIELD: radio engineering.SUBSTANCE: tunable band filter comprises N+1 inductances, which are connected serially, according capacitance and inductance, the second outputs of which are connected to common bus, to each of neighbouring inductances connection points. This chain creates band filter, which consists of N cascade connected links, input of specified band filter via the first inductance is connected to input potential terminal of device, output of this band filter is connected via the second inductance to outlet potential terminal of device, points of connection of neighbouring inductances, which are included into longitudinal branches of specified N link band filter, and also points for connection of the first and second inductances with this band filter produce N+2 intermediate outputs of device and are connected accordingly to N+2 inputs of commutator additionally introduced in device, M outputs of which are connected to capacitance box, comprising M capacitors, the first outputs of which are connected to M outputs of commutator, and the second outputs are connected to common bus.EFFECT: expansion of functional resources.1 dwg

ethod for tuning of multilink band filters // 2371840
FIELD: radio engineering.SUBSTANCE: invention is intended for fine tuning of multilink band filters (hereinafter referred to as filters) of radio electronic devices of microwave and in compliance with the specified requirements. Result is achieved by tuning of filter by specific points of frequency dependence of transfer coefficient (maximum point (7) - in regulation of links, point of maximum slope (6) - in tuning of resonators) at partial connections of filter into measuring track of device, which make it possible to simultaneously control both frequency of resonator tuning and links size. At the same time calculation is simplified for variation of resonator tuning frequency and links size. Method makes it possible to tune two and more filters with the same parametres. It is not required to make any absorbers, accessories for shorting, devices for energy drain.EFFECT: lower labour intensiveness of tuning process.3 dwg, 2 ex

Tuneable pass-band filter // 2333594
FIELD: physics.SUBSTANCE: invention refers to tuneable pass-band filters (PBF) of receivers and transmitters. In input and output PBF contains, two serial communications, i.e. inductive (1) and transformer (4), and between PBF resonant circuits transformer coupling communications (10) designed as structural component with windings on one frame. Note that communication windings of non-adjacent resonant circuits are located on both sides relative to winding of centre resonant circuit.EFFECT: maintenance of constant relative pass-band within whole operating frequency range.2 dwg

Circuit arrangement and method for regulating admissible circuit deviations // 2323519
FIELD: radio engineering; adjusting frequency-dependent filters.SUBSTANCE: proposed regulating device designed to adjust frequency response of filter has time-constant transducer that function to measure state of filter charge and to withdraw measurement results from mentioned time-constant transducer in the form of first voltage; converter used to digitize first voltage and to withdraw second voltage obtained as result of first-voltage conversion by mentioned converter; array of adjusting components; and selector using second voltage for selecting at least one adjusting component out of array of adjusting components; state of circuit charge can be adjusted in proposed device by means of at least one chosen adjusting component; mentioned time-constant transducer of proposed device has in addition change-over controller that functions to control at least one charge switch; closure of the latter switches filter over to state of charge.EFFECT: reduced admissible differences between measured and desired values of frequency-dependent filter components.14 cl, 6 dwg

Directional filter // 2317634
FIELD: radio engineering, possible use in radiolocation stations working with two multi-frequency generators.SUBSTANCE: directional filter contains two low-and-high-pass filters, a T-joint and two two-channel commutators. Channels of commutator rotors are coupled with shoulders of T-joint, which amount to λ/4 or λ/2 respectively with consideration of rotor channel lengths, where λ - wave length on shoulders of the T-joint.EFFECT: ensured transmission of two UHF signals of different frequencies sequentially or simultaneously, and of multi-frequency signals - sequentially to one antenna from two transmitters.4 dwg

Strip piezoelectric filter with complex loads // 2239279
The invention relates to electronics and can be used in tracts intermediate frequency (if) receivers

The high-frequency band of the piezoelectric filter // 2236083
The invention relates to electronics and can be used for frequency selection signals

Reject active piezoelectric filter // 2236082
The invention relates to electronics and can be used in communications technology and measurement techniques

The piezoelectric filter // 2199817
The invention relates to electronics and can be used for frequency selection signals

Strip piezoelectric filter // 2195765
The invention relates to electronics and can be used as a filter main selection of professional receivers

Synchronous digital comb filter // 2194359
The invention relates to radio engineering and electronics and can be used in systems signal processing, for example in systems of diagnostics of machines

The filter of constant component // 2182400
The invention relates to electrical engineering, in particular to filters for selecting a permanent part of the periodic voltages

Band-pass microwave filter // 2174737
The invention relates to microwave devices and can be used to filter high-frequency oscillations in large power that provides the minimum level of out-of-band radiation transmitting devices for various purposes

Bandpass arc-filter // 2165673
The invention relates to electrical engineering and can be used in selective electronic devices, mainly in the performance of microelectronic

Active rc - filter with multiple feedback // 2066920
The invention relates to electrical engineering and can be used in communication systems for transmission and reception of signals, control systems and medical equipment interference
 
2551206.
Up!