STACKED SHEET-TYPE BANDPASS FILTER

WIPO Patent Application WO/2019/158130

A1

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.

JPH05327311	DISTRIBUTED CONSTANT TYPE FILTER
JP2002252534	HIGH FREQUENCY FILTER
JP2002141705	HIGH FREQUENCY DEVICE

LI YANLIN (CN)
XIAO QIAN (CN)
ZHU JIANHUA (CN)
LIU JICHAO (CN)
ZHOU LIJIE (CN)
WANG ZHIHUA (CN)

PCT/CN2019/079889

August 22, 2019

March 27, 2019

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SHENZHEN ZHENHUA FU ELECTRONICS CO LTD (CN)

H01P1/203; H01P7/08

CN109301407A	2019-02-01
CN102610886A	2012-07-25
CN205488435U	2016-08-17
CN102509829A	2012-06-20
JPH0856102A	1996-02-27

SHENZHEN ZHONGYI UNION INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)

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