292 results about "Microstrip circuits" patented technology

The present invention provides a composite substrate type microstrip circulator. The composite substrate type microstrip circulator comprises a ferrite-dielectric substrate composed of a ferrite substrate and a dielectric substrate; a through hole is formed in the dielectric substrate; the ferrite substrate is fixed in the through hole in the dielectric substrate; the upper and lower surface of the ferrite-dielectric substrate are plated with metal layers; the upper surface of the ferrite-dielectric substrate is provided with a microstrip circuit; the lower surface of the ferrite-dielectric substrate is provided with a continuous metal layer; an annular junction region microstrip circuit in the microstrip circuit is disposed on the ferrite substrate; a matching microstrip circuit in the microstrip circuit is disposed on the dielectric substrate; a ceramic spacer and a permanent capacitor are disposed above the microstrip circuit; and the ferrite-dielectric substrate is fixed on a metalbase. Compared with a traditional full-ferrite substrate type microstrip circulator, the composite substrate type microstrip circulator has the advantages of small size and low consumption, and is applicable to surface mounted and highly integrated microwave circuits.

The invention discloses a low-pass band-pass five-duplex based on a novel frequency separation structure, which achieves through a microstrip circuit, and comprises a low-pass wave filter (T1) and four different center frequencies of band-pass wave filters (T2,T3,T4 and T5). The low-pass band-pass five-duplex based on the novel frequency separation structure can adjust a transmission zero on a band-pass side of the low-pass wave filter in a certain range by leading in a stepped impedance side line, thereby improving selectivity. The low-pass band-pass five-duplex based on the novel frequency separation structure can generate attenuation poles outside a low-pass wave filter band pass by leading in a defected ground structure, and greatly enlarges a stopband suppression range of a wave filter. The low-pass band-pass five-duplex based on the novel frequency separation structure can conveniently increase the channel number of multiple duplexes by using the novel frequency separation structure, and can control the center frequency of the band-pass channels. The low-pass band-pass five-duplex based on the novel frequency separation structure greatly reduces the effect of mutual interference between various channels by being excellently matched with the network, and enables various ports to have excellent isolation. The low-pass band-pass five-duplex based on the novel frequency separation structure has the advantages that the low-pass band-pass five-duplex based on the novel frequency separation structure is excellent in frequency selectivity, high out-of-band rejection, high isolation, small volume and simple and reliable structure and the like.