High isolation slot line duplexer applied to ultra-wideband channel and narrow-band channel

An ultra-broadband, high isolation technology, applied in waveguide-type devices, electrical components, circuits, etc., can solve the problems of increasing circuit size, unfavorable miniaturization, and difficult bandwidth adjustment, and achieve improved isolation, easy processing, and high isolation. degree of effect

Inactive Publication Date: 2014-05-21
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The traditional duplexer design is to design two filters separately, and then connect them through a matching network. The existence of the matching network increases the circuit size, which is not conducive to miniaturization
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  • High isolation slot line duplexer applied to ultra-wideband channel and narrow-band channel
  • High isolation slot line duplexer applied to ultra-wideband channel and narrow-band channel
  • High isolation slot line duplexer applied to ultra-wideband channel and narrow-band channel

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with accompanying drawing.

[0023] The present invention uses a PCB board with a relative dielectric constant of 2.2 and a thickness of 0.508mm as the substrate, and a PCB board of other specifications may also be used as the substrate. Such as figure 1 As shown, the upper and lower surfaces of the dielectric substrate 12 of the PCB are respectively coated with an upper metal patch 13 and a lower metal patch 14 . The upper layer microstrip line structure described below is formed on the upper layer of the dielectric substrate, and the slot line structure is formed after the lower metal patch 14 is etched.

[0024] figure 2 It is a structural schematic diagram of a slotted line duplexer. In the figure, the U-shaped slotted line resonator 6 and the multimode slotted line resonator 11 are located on the lower layer of the dielectric substrate, and the rest of the microstrip line structures are located...

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Abstract

The invention provides a high isolation slot line duplexer applied to an ultra-wideband channel and a narrow-band channel. The high isolation slot line duplexer comprises a first filter and a second filter, wherein the first filter and the second filter share a dielectric substrate and has a slotted line structure and a microstrip line structure; the slotted line structure is positioned on the lower layer of the dielectric substrate, and the microstrip line structure is positioned on the upper layer of the dielectric substrate; the bandwidth of the first filter is controlled through coupling among a U-shaped slotted line resonator, a first open stub and a second open stub, and can be controlled by adjusting intervals g1 among the U-shaped slotted line resonator, the first open stub and the second open stub; and the mode of resonance of the second filter can be controlled by loading the length of the stubs, accordingly the bandwidth of the second filter can be adjusted by adjusting the size of l5. According to the high isolation slot line duplexer, the bandwidths of the two filters can be adjusted independently; and the high isolation slot line duplexer is compact in structure, simple in circuit and high in frequency selectivity.

Description

technical field [0001] The invention relates to the field of duplexers, in particular to a high-isolation slotline duplexer applied to ultra-wideband channels and narrowband channels. Background technique [0002] Microwave duplexer is an important microwave device widely used in radio receivers. It is a crucial component for modern multi-frequency multi-service transceiver systems to share the same antenna. Its performance directly affects the work of RF front-end performance. The traditional duplexer design is to design two filters separately, and then connect them through a matching network. The existence of the matching network increases the circuit size, which is not conducive to miniaturization. Accordingly, some scholars use the shared resonator technology to replace the matching network. Although this greatly reduces the circuit size, this technology can only be applied to narrow-band systems, and the bandwidth is not easy to adjust. It is necessary to design a...

Claims

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Application Information

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IPC IPC(8): H01P1/20H01P1/203
Inventor 邓宏伟赵永久贺莹王洪李
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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