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Triple-band band-pass filter based on openstub loaded resonator

A technology of band-pass filters and open-circuit stubs, which is applied in the direction of resonators, circuits, waveguide devices, etc., can solve the problems of high pass-band insertion loss, large filter volume, and large number of resonators, etc., and achieve compact structure, The effect of simplifying complexity and increasing flexibility and freedom

Inactive Publication Date: 2017-09-05
XIDIAN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantages of this filter are that the insertion loss in the passband is relatively high, the return loss is relatively small, and the passband selectivity is poor.
However, the disadvantage of this method is that the volume of the filter is too large due to the large number of resonators.

Method used

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  • Triple-band band-pass filter based on openstub loaded resonator
  • Triple-band band-pass filter based on openstub loaded resonator
  • Triple-band band-pass filter based on openstub loaded resonator

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings.

[0020] Refer to attached figure 1 And attached figure 2 , to further describe the structure of the present invention.

[0021] The present invention includes a microstrip dielectric substrate 1 , a metal ground plate 2 , a resonator 3 , an input and output feeder 4 , and a ground through hole 5 . The metal ground plate 2 is arranged on the lower surface of the dielectric substrate 1; the resonator 3 is connected in series between the input feeder 41 and the output feeder 42, and the resonator 3, the input feeder 41, and the output feeder 42 are all arranged on the upper surface of the dielectric substrate 1; The above-mentioned grounding via 5 is disposed at the center of the metal grounding plate 2 and penetrates the upper surface and the lower surface of the dielectric substrate 1 .

[0022] The resonator 3 includes two symmetrically placed "ε" type open circuit ...

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Abstract

The invention provides a triple-band band-pass filter based on an openstub loaded resonator, and mainly solves the problems in the design of the multi-passband filter that the size of the filter is large, the internal insertion loss of the passband is high and the echo loss is low. The triple-band band-pass filter comprises a microstrip dielectric substrate (1), a metal grounding plate (2), resonators (3), input and output feed lines (4) and a grounding through hole (5). The metal grounding plate (2) is arranged on the lower surface of the dielectric substrate (1). The resonators (3) are connected in series between the input feed line (41) and the output feed line (42). The resonators (3) and the input feed line (41) and the output feed line (42) are arranged on the upper surface of the dielectric substrate (1). According to the filter, the overall size of the filter can be reduced, the extremely low insertion loss can be acuqired and each passband can be independently controlled so that stop-band suppression can be increased, the passband selectivity can be enhanced and the triple-band band-pass filter can be used for the WLAN and WIMAX wireless communication system.

Description

technical field [0001] The invention belongs to the technical field of communication, and further relates to a three-band microstrip bandpass filter based on an open-circuit stub loaded resonator OSLR (OpenStub Loaded Resonator) in the technical field of wireless communication. The present invention realizes a three-band band-pass filter capable of simultaneous filtering at three different working frequency bands, and can respectively realize the function of filtering microwave signals at the center frequencies of 2.4GHz, 3.5GHz, and 5.4GHz, and can be used for WLAN and WIMAX wireless communication system. Background technique [0002] Microwave filters are an indispensable and important part of RF front-end systems such as communication systems and radar systems. Their main function is to filter out system noise and interference from other channel signals to the greatest extent. Their performance directly affects the stability of the entire wireless communication system. a...

Claims

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Application Information

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IPC IPC(8): H01P1/203H01P7/08
CPCH01P1/203H01P7/082
Inventor 李龙栾文华刘海霞
Owner XIDIAN UNIV
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