Highly Integrated Switched Beamformer Module for 2.4-GHz Wireless Transceiver Application

Wei Ting Fang, Yo Shen Lin

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

In this paper, a miniature switched beamformer module for 2.4-GHz applications is proposed. The proposed beamformer module is based on the integrated passive device technology, and it integrates a 4 × 4 Butler matrix, a single-pole four-throw beam-selection switch, and a p-i-n diode-based transmit/receive (T/R) switch into a compact module size of only 4.9 text {mm} × 5 text {mm} × 0.9 mm. To achieve the compact module size, bridged-T coils are used to replace the transmission line sections in the 4 × 4 Butler matrix and the T/R switch. The measured insertion loss at the center frequency of 2.4 GHz is within 10.89 ± 1.13 dB for the receive path and 11.33 ± 0.69 dB for the transmit path. The measured phase error is less than 8.4° at 2.4 GHz. The proposed beamformer features low cost, compact size, and low profile. It can help enable the use of phased array technique in handheld mobile devices.

Original languageEnglish
Article number7530896
Pages (from-to)2933-2942
Number of pages10
JournalIEEE Transactions on Microwave Theory and Techniques
Volume64
Issue number9
DOIs
StatePublished - Sep 2016

Keywords

  • Bridged-T coil (BTC)
  • Butler matrix
  • RF switch
  • integrated passive device (IPD)
  • switched beamformer

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