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A novel, low-cost miniaturized directional coupler with high isolation is presented in this paper. The proposed coupler is obtained by using a short stub on the coupled port of a conventional branch-line directional coupler to achieve a very high isolation. Meanwhile, for the demand of miniaturization and low-cost of RFID systems, transmission lines are equivalent to the “π” lumped-element networks,...
This paper presents a compact multi-channel receiver front-end using system-in-package (SiP) integration technology. In the circuit linking design, a power divider network is introduced to keep the amplitude consistency of the local oscillator (LO) signal for each channel. The embedded low temperature co-fired ceramic (LTCC) RF filter equipped with two transmission zeros is developed by using substrate...
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