7 results about "Passband filter" patented technology

This invention belongs to the field of microwave passive device technology and discloses a dual-passband millimeter-wave filter power divider based on a gap waveguide, comprising a metal bottom cover layer and a metal top cover layer arranged from bottom to top; wherein, the metal top cover layer includes a top cover and a top cover frequency division structure disposed on the top cover; the metal bottom cover layer includes a bottom cover and a bottom cover frequency division structure, a filtering structure, and a power divider network structure disposed on the bottom cover. The dual-passband millimeter-wave filter power divider based on a gap waveguide provided by this invention solves the technical problems of existing dual-passband filter power dividers, such as high design optimization requirements, narrow dual-frequency bands, difficulty in flexibly changing frequency bands, and high processing requirements.

The application discloses an IPD dual-frequency passband filter chip and a radio frequency device, which comprises a substrate layer, a dielectric layer and an IPD dual-frequency passband filter circuit arranged on the substrate layer, wherein the IPD dual-frequency passband filter circuit comprises a signal input port, a filter network composed of lumped elements and a signal output port, and the filter network is connected with the input port and the output port through a first resonator and a second resonator respectively; the two passbands of the dual-frequency filter designed by the application have the characteristics of controllable bandwidth, good selectivity and strong out-of-band suppression capacity, and are suitable for miniaturized design of microwave circuits.

The application belongs to the field of microwave technology, and particularly relates to a double-passband filter phase shifter with independent continuous tuning center frequency and insertion phase capacity. The center frequency and insertion phase of the two filter passbands in the phase shifter can be independently adjusted. By adjusting the bias state of each variable capacitance diode, various working modes can be realized, including: low-frequency passband insertion phase is unchanged, and high-frequency passband phase is continuously adjustable; high-frequency passband insertion phase is unchanged, and low-frequency passband phase is continuously adjustable; high-frequency passband remains unchanged, and low-frequency passband can still realize continuous phase adjustment after frequency shift; low-frequency passband remains unchanged, and high-frequency passband can still realize continuous phase adjustment after frequency shift. Thus, multi-band independent controllable application can be realized.

This invention discloses a three-channel dual-passband filter power divider, comprising three stacked metal layers and a dielectric substrate. The dielectric substrate contains four isosceles right-angled triangular substrate integrated waveguide resonant cavities enclosed by metallized vias. First and second resonant cavities of the same size are connected by their right-angled sides to form a first triangular unit; third and fourth resonant cavities of the same size but larger are also connected by their right-angled sides to form a second triangular unit, with the hypotenuses of the two units adjacent. By setting coupling windows between specific cavities and metallized via isolation walls between the third and fourth cavities, the first and second cavities collaboratively generate a first passband, and the third and fourth cavities collaboratively generate a second passband. The input port is located on the right-angled side of the first cavity, and the three output ports are located on the right-angled side of the second cavity, with isolation resistors connecting the ports. This invention highly integrates dual-passband filtering and three-channel power division functions, offering advantages such as compact structure, low insertion loss, and good output consistency.

The application provides a design method of an analog multi-passband filter. It is a hybrid method, which obtains a rough prototype of the analog multi-passband filter, and then fine tunes it until the equal ripple is realized in each passband. The rough prototype constructed by the analytic method contains important information of the analog multi-passband filter, effectively reducing the range of optimization and fine tuning. The method has fast convergence speed, and the performance of the designed analog multi-passband filter is flexible and controllable, including the number of passbands, the performance of each passband, the transmission zero point, and the complex response to meet more stringent technical requirements. Based on the filter polynomial derived by the design method of the analog multi-passband filter, various topological coupling matrices can be obtained for actual circuit implementation.

The application discloses a miniaturized three-passband filter of a substrate integrated waveguide built-in stripline resonator, which is composed of two SIW resonators, two one-end short-circuit and the other-end open-circuit lambda / 4 stripline resonators and two two-end open-circuit lambda / 2 stripline resonators, and the resonators form a three-passband filter in a series topology structure. The application utilizes the TE101 mode of the two SIW resonators, firstly, two one-end short-circuit and the other-end open-circuit lambda / 4 stripline resonators are symmetrically placed in the two SIW resonators to form a two-stage point and double-passband filter, and on the basis, the two one-end short-circuit and the other-end open-circuit lambda / 4 stripline resonators are coupled with the two two-end open-circuit lambda / 2 stripline resonators to form a two-stage point and three-passband filter. By embedding four stripline resonators in the SIW cavity, the miniaturization of the overall structure is realized, and the circuit area can be significantly reduced by about two-thirds while the number and order of passbands are maintained.