Compact and low-loss diplexer design and fabrication for WLAN/WiMAX application

Bin Wu, Zhe Chen, Jun-Ge Liang, Cong Wang, Yihui Jin, Xiaoxin Zhang and Xiaofeng Gu

Journal of Electromagnetic Waves and Applications, 2019, vol. 33, issue 17, 2257-2265

Abstract: In this paper, a compact and low-loss diplexer is designed and fabricated using integrated passive device (IPD) technique. This IPD-based diplexer can be utilized in antenna system for WLAN and WiMAX applications. It is composed of a low-pass filter and a high-pass filter, built on the GaAs substrate with the overall size of 0.95 × 0.95 mm2. The IPD diplexer realizes a dual-mode operation of 2.4 GHz for WLAN and 3.3 GHz to 3.8 GHz for WiMAX, respectively. The measurement results match well with the simulation results, in which the insertion loss at operation bands are below 0.5 dB (2.4 GHz) and 0.64 dB (3.3 GHz to 3.8 GHz), and the stopband suppression keeps higher than 20 dB.

Date: 2019
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DOI: 10.1080/09205071.2019.1676827

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