8 results about "Microstrip circuits" patented technology

The utility model belongs to the microwave device technical field discloses a kind of microwave multilayer board intervertical interconnection circuit structure, including cavity, microwave multilayer board and radio frequency glass insulator;Microwave multilayer board is fixed in the two sides of cavity, glass insulator is set on the extension structure parallel to microwave multilayer board in cavity geometric center, and microwave multilayer board forms air coaxial structure, for being connected with microstrip circuit by bonding mode and realizing the matching transmission of microwave signal, the vertical interconnection of microwave multilayer board radio frequency circuit is completed.The utility model forms air coaxial structure between radio frequency glass insulator and microwave multilayer board to realize circuit matching, more simple than prior art using circuit mode matching.And gold wire bonding mode can realize automation assembly and improve assembly efficiency.

The utility model relates to microstrip circuit technical field discloses a kind of microstrip circuit and radio frequency coding device based on multimode radio frequency coding, including the phase-shift coding unit being connected between quadrature power divider and combiner, phase-shift coding unit includes the absorption modal microstrip line for modal coding, positive modal microstrip line and negative modal microstrip line, the coding modal needed is selected by modal selection switch, wherein, positive modal microstrip line is straight-through microstrip line, output phase is synchronous with input phase, terminal short circuit line is also connected on straight-through microstrip line, two sections are set apart in terminal short circuit line, and it is L type bending structure, the bending section of two L type bending structures is parallel with positive modal microstrip line, and opposite direction is oriented.The utility model can effectively reduce the dispersion effect of straight-through microstrip line in wide frequency band by setting terminal short circuit line on the straight-through microstrip line of positive modal microstrip line, and improve broadband performance.

This invention discloses a suboctave band equalization structure and a method for optimizing in-band flatness based on it, relating to the technical field of microwave circuits. The suboctave band equalization structure consists of a 50-ohm microstrip line, an absorption resistor, and a high-impedance line. The high-impedance line employs an S-shaped bend structure to reduce volume, and the absorption resistor's geometric dimensions are adjusted to precisely control the equalization depth. This invention utilizes the transmission characteristics of a resonator exhibiting high insertion loss at the center of the band and gradually decreasing insertion loss at both sides when the fundamental frequency reaches the second resonant frequency. This complements the transmission characteristics of a filter, which has low insertion loss in the center of the passband and gradually increasing insertion loss at both sides. This application can significantly improve in-band flatness by physically canceling passband edge losses through passive microstrip circuits while ensuring high matching performance with return loss better than -20dB. It has advantages such as simple structure, easy integration, and strong engineering applicability.

The application discloses a four-mode reconfigurable microstrip line filter integrated with reflection-free and multi-zero-point response, which adopts a single microstrip circuit topology with left-right symmetry and is composed of an upper branch band-pass filter circuit, a T-shaped joint structure, a pair of cross-shaped absorption branches, a pair of coupled line absorption branches, five groups of switch pairs and input and output ports; the coupled lines at the two ends of the upper branch band-pass filter circuit are connected with the ground through the switch pair connection ports and the T-shaped joint structure, and the absorption branches are connected with the ports in parallel through the switches; the four-mode switching of double-band rejection, full-band reflection-free band-pass, full-band reflection-free band-stop and multi-transmission zero-point band-stop is realized in the same circuit through the on-off control of the switches; the integration degree is improved; the reflection-free characteristic of the band-stop energy dissipation is realized by relying on the resistance-loaded absorption branches; the frequency selectivity and the band-stop suppression capability are strengthened in combination with the multi-transmission zero points; and the problems of low resource reuse rate, lack of reflection-free characteristic and uneven multi-mode performance of the traditional structure are solved.

A Ku-band self-biased circulator belongs to the field of microwave ferrite device technology. The circulator includes a composite substrate and a microstrip circuit formed on the composite substrate; wherein the composite substrate includes a secondary dielectric sheet and an array of ferrite rods nested within the secondary dielectric sheet, the array of ferrite rods being composed of nested array of ferrite rods and a primary dielectric substrate. This invention, by employing a composite substrate structure with array of ferrite rods nested within a primary dielectric substrate, effectively reduces the influence of demagnetizing fields through the placement of the rod-shaped ferrites. The synergistic generation of multiple rod-shaped ferrites produces a stable bias magnetic field, providing good control over the device's operating frequency range. While maintaining non-reciprocal characteristics, it significantly reduces magnetic loss in the Ku-band, thereby reducing insertion loss.

The utility model discloses a C wave band low harmonic power amplifier relates to the field of amplifier, and the amplifier includes the phase -locked loop frequency source module, and its output is connected pre -inhibit harmonic filter, adjustable gain forestage amplifier, interstage dynamic harmonic suppression module and double power divider microstrip circuit in proper order. Two output ends of double power divider microstrip circuit are connected first, second final stage power amplifier respectively, and its output is synthesized through double -way power synthesizer microstrip circuit again, and finally by radio frequency port output, while access feedback detection module, under the control of control module, through interstage dynamic harmonic suppression module to harmonic real -time regulation and control, combine the closed -loop feedback mechanism of feedback detection module, and the harmonic distortion caused by temperature drift, device aging is effectively suppressed, and the stability of harmonic suppression performance is significantly improved while guaranteeing high -power output.

The application discloses a kind of based on waveguide reconfigurable multi-band terahertz high-efficiency frequency multiplier, belong to terahertz technical field, including sequentially first input narrow waveguide, microstrip circuit, output narrow waveguide and output rectangular waveguide, and multiple detachable reconfigurable input matching integrated structure connected with first input narrow waveguide, flange choke ring is arranged in the periphery of first input narrow waveguide;By detaching and replacing input matching integrated structure, the frequency multiplication output of multiple frequency points in target waveguide bandwidth is realized.The application only uses one microstrip circuit chip, one main cavity, one output matching structure and multiple detachable reconfigurable input matching integrated structure, i.e.can realize the high-efficiency frequency multiplication output of multiple frequency points in target waveguide bandwidth, not only satisfies model miniaturization trend, also greatly reduces chip cost.

The application relates to a C-band self-biased circulator with a high-frequency filtering function and relates to the technical field of microwave / millimeter wave passive devices. The circulator comprises a composite substrate and a microstrip circuit formed on the composite substrate; wherein the composite substrate is obtained by gradually embedding a first ferrite substrate, a second ferrite substrate and a dielectric substrate in a concentric circle mode from inside to outside. The ferrite substrate is composed of a high-saturation-magnetization ferrite inner core and a low-saturation-magnetization ferrite outer ring, the difference in permeability of the two can excite a perimeter mode at the boundary, and the working bandwidth of the circulator can be significantly widened. Meanwhile, the center circle is matched with an asymmetric stepped impedance transformer, which not only ensures high isolation and good matching of the main band, but also forms a controlled filtering / trap function in the high-frequency band, thereby realizing the dual functions of 'band pass + band out suppression', and facilitating the system to suppress high-frequency interference or meet the multi-frequency coexistence requirement.