A compact 3-dB 90&amp;#x00BA; directional coupler in integrated passive devices manufacturing process for LTE applications

Wang, C.; Li, Y.; Kim, N.Y.

doi:10.1109/apcap.2014.6992756

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“…Apart from branch-line hybrid couplers, bandpass filters also attract more and more attention. Thus, it is beneficial to integrate them for size reduction [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Miniaturized Filtering 3-Db Branch-Line Hybrid Coupler With Wide Suppression Band

Du¹,

Weng²,

Zhang³

2018

PIER Letters

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Abstract-A 3-dB branch-line hybrid coupler with wide stopband responses is presented in this letter. An equivalent K-inverter with bandpass function is used instead of one quarter-wavelength transmission line, which will realize size reduction and wide stopband characteristic of the coupler. Prototype of a branch-line hybrid coupler, which divides the power equally with 90 • phase difference between the output ports, is also fabricated and tested. Both the simulation and measurement results show that such a hybrid coupler exhibits an 83.2% size reduction and has transmission suppression of −20 dB or less within five-fold bandwidth.

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“…Apart from branch-line hybrid couplers, bandpass filters also attract more and more attention. Thus, it is beneficial to integrate them for size reduction [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%