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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 devices, resonators, electrical components, etc., can solve the problem of narrow upper stop band suppression bandwidth, achieve good passband characteristics, high space utilization, and improve Select the effect of performance

Active Publication Date: 2012-07-04
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

[0024] The structure diagram of the 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. The ultra-wideband filter consists of a first input / output port 1, a second input / output port 2. The upper microstrip structure, the middle layer dielectric substrate and the bottom metal floor are composed, wherein the upper microstrip structure and the bottom metal floor are respectively attached to and below the middle layer dielectric substrate.

[0025] Such as figure 2 As shown, the upper microstrip structure includes a first feeding network, a multi-stub loaded multimode resonator, and a second feeding network. The first feeding network is composed of uniform transmission line three 3, uniform transmission line four 4 and uniform transmission line five 5. One end of uniform transmission line three 3 is connected to the first input / outp...

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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 present invention relates to the technical field of radio frequency filters in wireless communications, and more specifically, 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 simple voice communication, but also the pursuit of high-definition video and other wireless communication systems with large data volume and high confidentiality. Ultra-wideband (UWB) wireless communication technology has become a research hotspot in the current wireless communication field due to its simple system structure, low cost, low power consumption, high transmission rate, and good confidentiality. The initial form of ultra-wideband wireless communication technology is a pulse radio technology that directly uses pulses with a pulse width of nanoseconds or sub-nanoseconds as informa...

Claims

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Application Information

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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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