Modeling and design of a vacuum resonator filter for LTE-A transceiver with two cross couplings
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Keywords:
Filter
Cavity filter
LTE-A base station
11th order model
Abstract
In this paper, we present modeling and design of a bandpass filter for the use in Remote Radio Unit (RRU) transceivers (TRX) of Long Term Evolution Advantage (LTE-A) base stations. Generalized Chebyshev response is employed to synthesize the filter. An 11th order vacuum cavity filter model with two quadrupt transmission zeroes turned by Group Delay Method is applied to achieve the filter’s characteristics. A metal cylinder with rectangular cross section is used to connect two resonators with the aim of improving the mainline coupling. PC simulations are carried out and obtained results indicate that the designated filter meets all the requested specifications of a LTE-A TRX filter at Band 3, i.e., Return loss < -10dB@1805-188 MHz, Passband ripple < 0.2dB, Insertion Loss < 2dB, Isolation TX-RX ≥ 90 dB@ 1710-1785 Mhz.
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Published
Nov 30, 2017
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How to Cite
Tran Thi Thu Huong, Nguyen Xuan Quyen, Vu Van Yem. “Modeling and Design of a Vacuum Resonator Filter for LTE-A Transceiver With Two Cross Couplings”. The University of Danang - Journal of Science and Technology, vol. 11, no. 120.4, Nov. 2017, pp. 27-31, https://jst-ud.vn/jst-ud/article/view/3828.
