41results about How to "High square factor" patented technology

The invention discloses a capacitive coupling device and a filter. The capacitive coupling device comprises a plurality of solid media monomers, the adjacent media units are spliced together, At leastone adjacent dielectric monome is provided with a capacitively couple structure on that splicing surface, the capacitive coupling structure includes a first blind hole and a first air coupling windowwith a surface unmetallized, The depth of the first blind hole is greater than or equal to 1/2 of the depth of the first air coupling window and less than the depth of the first air coupling window,a metal shielding layer is arranged on the inner wall of the first blind hole, and the first air coupling window is arranged on the two sides and the bottom of the first blind hole. Blind holes and air coupling windows are arranged on the splicing surface to realize coupling between the two cavities. The transmission zero can be formed at the low end of the pass band of the filter, and the rectangular coefficient of the filter is increased, thereby improving the filter performance and reducing the volume of the filter.

The invention discloses a specific harmonic cancellation multi-level radio frequency pulse width modulation method in which K odd number of specific harmonic waves are selected, and M-level RF-PWM signals are processed to be equivalent to N 3-level RF-PWM signals with pulse width separately controlled by corresponding comparison thresholds and stacked in a weighted manner, wherein K, M and N are all integers more than 0, N is more than K, and M is equal to 2N+1; N comparison thresholds and corresponding weighting coefficients are controlled in real time according to a normalized envelope signal SA, so that the K specific harmonic wave components of the N 3-level RF-PWM signals has stacked in a weighted manner are mutually counteracted, a base wave component is in direct proportion to the SA, and thus the K specific harmonic waves and integer multiples of odd harmonic waves of the M-level RF-PWM signals are eliminated. Based on the method, the invention also provides a specific harmoniccancellation multi-level radio frequency pulse width modulator. Compared with the prior art, the modulation method and the modulator have the beneficial effects that on the basis that the basic modulation performance is equivalent to the RF-PWM of the same level in the prior art, the suppression requirement on the filter is effectively reduced, the cost and size of the filter are reduced, and thus the comprehensive performance of the wide frequency band DTX is improved.

The invention discloses a miniaturized frequency selection surface based on a double-opening resonance ring. A band-pass effect is formed through the combined action of the double-opening resonance ring and a middle coupling aperture. When electromagnetic wave is irradiated to the frequency selection surface, resonance is caused by the opening resonance ring. The frequency selection characteristicof the opening resonance ring is utilized, so that a high spatial filtering function is achieved, meanwhile, the miniaturization characteristic is realized; compared with a common frequency selectionsurface, the cell area is greatly reduced, and the size of the whole circuit unit is only 0.3lambda 0*0.3lambda 0; meanwhile, by virtue of mutual coupling between the opening gap of the resonance ring and an interlayer coupling window, a good out-of-band rejection effect is achieved; and a transmission zero point is arranged on each of the two sides of the band, so that the rectangular coefficient of the circuit is greatly improved. A symmetrical circuit structure is adopted, so that the structure is simple, and machining is easy; and meanwhile, the whole circuit is quite high in stability around the incident angle theta and a formula which is as shown in the specification, so that the practical value is increased.

The invention provides an LC elliptic function electrically-tunable filter which relates to the field of electronic communications and aims at solving the technical problems of low rectangular factors, narrow working frequency band, complex structure, large size, and the like in the traditional electrically-tunable filter. The LC elliptic function electrically-tunable filter comprises a chip capacitor, a chip inductor, a chip resistor, a variable capacitance diode, and the like. The invention is suitable for the design of the electrically-tunable filter.

The invention discloses a radio frequency pulse width modulator based on digital delay line units, and a modulation unit. The modulator comprises a pulse delay control unit, a radio frequency carrierpulse production unit, the first to the fourth digital delay line units, and the first to the second two-channel multiplexers; the modulation method is as follows: the pulse delay control unit in theradio frequency pulse width modulator adopts a five-level radio frequency pulse modulation method, specifically a 3X sub-harmonic cancellation five-level radio frequency pulse modulation method, wherein X is any odd greater than zero, namely, decomposing five level radio frequency pulses needing to output into weighted stacking of two three-level radio frequency sub-pulses, and controlling the pulse widths of two three-level radio frequency sub-pulses, thereby enabling the 3X sub-harmonic amplitude to be zero after performing weighted stacking on two three-level radio frequency sub-pulses. Theactive cancellation and effective inhibition on the 3X sub-harmonic of the five-level radio frequency pulse modulation signal are realized, the cost and the volume of the filter are reduced, and thecomprehensive performance of the wide-frequency band full-digital sender is improved.

The invention discloses a 5G communication frequency band band-pass filter based on an LTCC technology. The band-pass filter comprises a dielectric substrate, a metal isolation layer, a port unit and a filter circuit unit, wherein the dielectric substrate is a low-temperature sintered ceramic substrate and has a high dielectric constant, the metal isolation layer is composed of an upper metal silver layer and a lower metal silver layer, the port unit is a metal silver layer covering the surface of the dielectric substrate and comprises an input end, an output end and a ground end, and the filter circuit unit comprises six resonance circuits and zero coupling circuits which are arranged in parallel. The 5G communication frequency band band-pass filter is realized by adopting the HFSS three-dimensional integrated design and adopting a low-temperature co-fired ceramic technology, and has the advantages of being small in insertion loss, small in size, light in weight, high in reliability, good in temperature stability, good in electrical performance batch consistency, low in cost, capable of being produced on a large scale and the like.

The invention discloses an LC filter with a wide band, a high rectangle coefficient and a high suppression band-pass. The high suppression band-pass LC filter comprises a filter cavity, a printed circuit board, capacitors, hollow-core coils and an insulator, wherein the printed circuit board is arranged inside the cavity, the hollow-core coil is sleeved with an insulating varnish wrap of a low dielectric constant, and the capacitor and the hollow-core coil are fixed on the printed circuit board through tin soldering; the insulator is fixed inside the cavity, and one end of the insulator is welded on the printed circuit board; the LC filter is of an eight-order LC filter structure, and a topological structure of the LC filter is provided with 12 LC resonant circuit formed by the capacitors and the hollow-core coils, and each LC resonant circuit is formed by a capacitor and a hollow-core coil. The performance and the volume of the filter are taken into consideration, the LC filter has the advantages of small package, large bandwidth, low fluctuation and high stopband rejection, and meanwhile the standing wave and the insertion loss are small.

The invention discloses a capacitive coupling device and a filter. The device at least comprises a first dielectric resonator and a second dielectric resonator, a negative coupling hole is formed between the first dielectric resonator and the second dielectric resonator; the negative coupling hole comprises a longitudinal blind hole and a transverse blind groove, the longitudinal blind hole is located in the surface of a body at the connection position of the first dielectric resonator and the second dielectric resonator and is perpendicular to the surface of the body, and the transverse blindgroove is located in the body at the connection position of the first dielectric resonator and the second dielectric resonator. According to the capacitive coupling device, the longitudinal blind hole and the transverse blind groove are formed between the two dielectric resonators to form the negative coupling hole, the negative coupling between the two dielectric resonators is achieved, and thestructure is simple; the structure is used in the filter, because the area formed by two holes is larger, a transmission zero point can be formed at the low end of the passband of the filter, the rectangular coefficient of the filter is increased, the performance of the filter is improved, and the size of the filter is reduced.

The invention discloses a superconducting filter structure. The superconducting filter structure comprises an L waveband band-pass filter, a P waveband band-pass filter and an L waveband band-stop filter, which are integrated on a superconducting thin film substrate; an input end of the L waveband band-pass filter is connected with an input end of the P waveband band-pass filter, and the connection point therebetween serves as an input end of the superconducting filter structure; an output end of the L waveband band-pass filter is connected with an input of the L waveband band-stop filter, and pass bands of the L waveband band-pass filter and the L waveband band-stop filter are partially superposed; an output end of the P waveband band-pass filter is connected with an output end of the L waveband band-stop filter, and the connection point therebetween serves as an output end of the superconducting filter structure; each of the L waveband band-pass filter and the P waveband band-pass filter consists of an input feeder line, an output feeder line and a plurality of half-wavelength resonators; and the L waveband band-stop filter consists of a coupling microstrip line and a plurality of half-wavelength resonators. The superconducting filter structure can work at two frequency bands at the same time, and has a relatively high rectangle coefficient.

The invention discloses an FSIR-based multi-zero-point transmission characteristic filter. Multiple FSIRs form an array in a combination manner and then multi-path coupling is further formed; a puncturing hole is formed in the center of the filter, namely the center of the coupling path, to be grounded, and an electric coupler is introduced to further form electromagnetic mixed coupling; by virtueof multi-path crossed coupling and electromagnetic mixed coupling, multiple transmission zero points are realized; the high sideband suppression and wide stop band suppression performance of the filter are realized based on the multiple zero points; and meanwhile, miniaturization of the filter is realized through the FSIR. The filter has high performance advantage while the filter also can be simple in structure; batch manufacturing of the filters can be realized by adopting a simple printed circuit board process, and the processing precision can be well controlled, high rate of finished products is achieved, and the advantage of low cost can be ensured; and the filter can be applied to communication, radar and other wireless systems in a large-scale manner, such as LMDS, MMDS, 4G, 5G, marine affair radar and the like.

The invention discloses a terahertz metamaterial filter, which comprises n * n same units. Each unit is composed of multiple layers of high polymer materials including polymethacrylimide and polyimideand multiple metal layers, wherein the layers are aligned and repeatedly stacked in the sequence of metal-polyimide-polymethacrylimide from the incident direction of terahertz waves. Terahertz wavesenter the filter to generate electromagnetic resonance, the terahertz waves at the resonant frequency are reflected and absorbed to form a stop band, and waves at other frequencies are not hindered. With the filter provided by the invention, problems of small rectangular coefficient and narrow bandwidth in the existing filters of the same type are solved, and the filter has the advantages of flattop, insensitive polarization and low cost.

The invention relates to the technical field of filters, in particular to a high-selectivity suspended strip line ultra-wideband filter which comprises a metal shell body, a dielectric plate and a microstrip line structure, wherein the microstrip line structure comprises connecting units and middle units, each connecting unit comprises a high-impedance inductance microstrip and a low-impedance capacitance microstrip at least located on one side of the high-impedance inductance microstrip, each middle unit comprises a high-impedance inductance micro-strip and low-impedance capacitance micro-strips located on the two sides of the high-impedance inductance micro-strip, the two connecting units and the multiple middle units are arranged at the top and the bottom part of the dielectric plate inan up-down staggered mode, every two adjacent low-impedance capacitance micro-strips correspond to each other in the thickness direction of the dielectric plate to form a capacitance part, the connecting end of at least one connecting unit is sequentially connected with the high-impedance inductance microstrips and the low-impedance capacitance microstrips in series, and/or at least one intermediate unit is sequentially connected with the high-impedance inductance microstrips and the low-impedance capacitance microstrips in series, and a corresponding transmission zero point is generated in astop band of the filter. According to the high-selectivity suspended strip line ultra-wideband filter, the zero cavity technology is introduced for the first time, and the rectangular coefficient ofthe filter can be improved.

The invention discloses a capacitive coupling device and a filter. The capacitive coupling device comprises a first dielectric resonator and a second dielectric resonator which are connected with eachother, wherein a negative coupling hole is formed between the first dielectric resonator and the second dielectric resonator, the negative coupling hole comprises a longitudinal blind hole and a transverse blind hole, the longitudinal blind hole and the transverse blind hole are perpendicular to each other, the longitudinal blind hole is perpendicular to the top surfaces of the first dielectric resonator and the second dielectric resonator, and the transverse blind hole is perpendicular to the side surfaces of the first dielectric resonator and the second dielectric resonator. According to the capacitive coupling device, the two blind holes which are perpendicular to each other are formed between the two dielectric resonators to form the negative coupling hole, negative coupling between the two dielectric resonators is achieved, and the structure is simple. The structure is used in the filter, due to the fact that the area formed by the two holes is larger, a transmission zero point can be formed at the low end of a passband of the filter, the rectangular coefficient of the filter is increased, the performance of the filter is improved, and the size of the filter is reduced.

The invention discloses a double-zero notch dual-polarized antenna for a WLAN. The antenna comprises a dielectric substrate, an upper metal layer and a lower metal layer, the upper metal layer and thelower metal layer are respectively printed on the upper surface and the lower surface of the dielectric substrate, and the upper metal layer and the lower metal layer are respectively printed with two pairs of dipole antennas in cross distribution. Coplanar waveguide notch structures are arranged in antenna arms of the dipole antennas, and the notch structures are double-U-shaped broken lines etched on upper metal layer feeder lines. The double-U-shaped broken line notch structure has the characteristic of miniaturization, an inner ring of a dipole antenna with a small area is convenient to embed, and a notch function is introduced under the condition that the size of the antenna is not increased; a double-zero trapped wave structure formed by the trapped wave structures and an opening outer ring enables the antenna to obtain a double-zero trapped wave function, the stop band is wide, and the rectangular coefficient is high; an extra filter circuit is not needed, so that the antenna is small in size and simple in structure.

The invention discloses a high-performance filter integrating combination of a passive device and an acoustic mechanical wave device, and relates to the technical field of filters, the high-performance filter comprises a substrate, an FBAR device and an IPD device, the FBAR device comprises a cap layer and an RDL layer, the FBAR device and the IPD device are integrated and assembled on the substrate, and the cap layer and the RDL layer are arranged on the substrate. The integration mode of the FBAR device and the IPD device comprises one of the modes that partial wiring and inductance wiring are concentrated in a cap layer and an RDL layer of the FBAR device or the IPD device is integrated in the cap layer of the FBAR device. According to the invention, the cascade stage number of the FBAR can be greatly reduced, the size of the FABR device is reduced, and the overall heat dissipation effect is relatively improved (the power capacity is improved) and the suppression of parasitic harmonics is enhanced in combination with the IPD device. Products with different frequency bands, different bandwidths, low insertion loss, high rectangular coefficient, high power and high harmonic suppression can be flexibly realized, and the device is suitable for popularization and application.