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Title:
STACKED SHEET-TYPE BANDPASS FILTER
Document Type and Number:
WIPO Patent Application WO/2019/158130
Kind Code:
A1
Abstract:
Provided is a stacked sheet-type bandpass filter, comprising a ceramic substrate and six resonators, the resonators all being three-layer stripline resonators, wherein first, third and fifth order stripline resonators among the six resonators are located on a lower plane, and second, fourth and sixth order stripline resonators are located on an upper plane. The stacked sheet-type bandpass filter also comprises a Z-shaped coupling line which cross-couples the second and fourth order stripline resonators. The three-layer striplines of the six three-layer stripline resonators form two additional flat load capacitances, so that the length of the resonator is far smaller than 1/4 of the wavelength. The six resonators are arranged on the two planes at different heights, so as to utilise the vertical space and shorten the horizontal distance while ensuring a same coupling amount, so that the stacked sheet-type bandpass filter has a higher degree of integration, a small size, a low passband insertion loss, a high stop band rejection, and good reliability.

Inventors:
LI, Yanlin (4F Zhenhua Industial Park, East Heping Road Qinghu, Longhua New Distric, Shenzhen Guangdong 0, 518000, CN)
XIAO, Qian (4F Zhenhua Industial Park, East Heping Road Qinghu, Longhua New Distric, Shenzhen Guangdong 0, 518000, CN)
ZHU, Jianhua (4F Zhenhua Industial Park, East Heping Road Qinghu, Longhua New Distric, Shenzhen Guangdong 0, 518000, CN)
LIU, Jichao (4F Zhenhua Industial Park, East Heping Road Qinghu, Longhua New Distric, Shenzhen Guangdong 0, 518000, CN)
ZHOU, Lijie (4F Zhenhua Industial Park, East Heping Road Qinghu, Longhua New Distric, Shenzhen Guangdong 0, 518000, CN)
WANG, Zhihua (4F Zhenhua Industial Park, East Heping Road Qinghu, Longhua New Distric, Shenzhen Guangdong 0, 518000, CN)
Application Number:
CN2019/079889
Publication Date:
August 22, 2019
Filing Date:
March 27, 2019
Export Citation:
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Assignee:
SHENZHEN ZHENHUA FU ELECTRONICS CO., LTD. (4F Zhenhua Industial Park, East Heping Road Qinghu, Longhua New Distric, Shenzhen Guangdong 0, 518000, CN)
International Classes:
H01P1/203; H01P7/08
Foreign References:
CN109301407A2019-02-01
CN102610886A2012-07-25
CN205488435U2016-08-17
CN102509829A2012-06-20
JPH0856102A1996-02-27
Attorney, Agent or Firm:
SHENZHEN ZHONGYI UNION INTELLECTUAL PROPERTY AGENCY CO., LTD. (9/F Baochun Building, No. 1014 Shennan Middle Road Yuanling Street,Futian Distric, Shenzhen Guangdong 8, 518028, CN)
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