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Ultra-wide-band filter with high selectivity and ultrahigh attenuation band restrain effect

An ultra-wideband filter, high-selectivity technology, applied in waveguide-type devices, resonators, electrical components, etc., can solve the problem of narrow upper stopband suppression bandwidth, etc., to achieve good passband characteristics, compact structure, high stopband inhibiting effect

Active Publication Date: 2015-03-11
广州桑瑞科技有限公司
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Problems solved by technology

However, the multimode resonator has only three resonant modes in the passband, and the transmission characteristics in the passband need to be further improved; the upper stopband suppression bandwidth of the designed ultra-wideband filter is also very narrow, which also needs to be improved

Method used

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  • Ultra-wide-band filter with high selectivity and ultrahigh attenuation band restrain effect
  • Ultra-wide-band filter with high selectivity and ultrahigh attenuation band restrain effect
  • Ultra-wide-band filter with high selectivity and ultrahigh attenuation band restrain effect

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Embodiment

[0025] The structure schematic diagram of ultra-wideband filter of the present invention is as figure 1 As shown, the ultra-wideband filter has good pass-band characteristics, high pass-band selectivity and ultra-high stop-band suppression effect, and the ultra-wideband filter is composed of the first input / output port 1, the second input / output port 2. Composed of an upper microstrip structure, an intermediate dielectric substrate and a bottom metal floor, wherein the upper microstrip structure and the bottom metal floor are respectively attached to and below the intermediate dielectric substrate.

[0026] Such as figure 2As shown, the upper microstrip structure includes a first feeding network, a multi-stub loaded multimode resonator, and a second feeding network. Wherein the first feeding network is composed of uniform transmission line 3 3, uniform transmission line 4 4 ​​and uniform transmission line 5 5, wherein one end of the uniform transmission line 3 3 is connected...

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Abstract

The invention provides an ultra-wide-band filter with high selectivity and an ultrahigh attenuation band restrain effect, which is composed of a first input / output port, a second input / output port, an interlayer medium substrate, an upper layer micro-strip structure arranged on the interlayer medium substrate and an underlying metal floor board. The upper layer micro-strip structure comprises a first feed network, a multi branch knot loading multimode resonator and a second feed network. The multi branch knot loading multimode resonator of the upper layer micro-strip structure has five resonance modes in an ultra-wide-band frequency band scope, a transmission zero is generated above and below a passband respectively, and passband selectivity is greatly improved. In addition, generated zero and frequency doubling zero of the zero restrains high sequence resonance modes of the multimode resonator, and restraining effects of an upper attenuation band of the passband are greatly broadened. The ultra-wide-band filter has good passband character, high passband selectivity and ultra-high attenuation band restraining effect, and is applicable to ultra-wide-band wireless communication systems with high standard communication.

Description

technical field [0001] The invention relates to the technical field of radio frequency filters in wireless communication, and more specifically relates to an ultra-wideband filter with high selectivity and ultra-high stopband suppression effect. Background technique [0002] With the rapid development of communication technology, people's requirements for wireless communication are not only for simple voice communication, but also for wireless communication systems with large data volume and high security such as high-definition video. Ultra-wideband (UWB) wireless communication technology has become a research hotspot in the field of wireless communication because of its simple system structure, low cost, low power consumption, high transmission rate, and good security. The initial form of ultra-wideband wireless communication technology is the pulse radio technology that directly uses pulses with a pulse width of nanoseconds or sub-nanoseconds as information carriers, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/203H01P7/08
Inventor 褚庆昕吴小虎
Owner 广州桑瑞科技有限公司
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