2.4‐GHz Power Amplifier with Power Detector Using Metamaterial‐Based Transformer‐Type On‐Chip Directional Coupler. Issue 3 (1st June 2013)

• Record Type: Journal Article
• Authors: Dang, Trung‐Sinh; Tran, Anh‐Dung; Lee, Bomson; Yoon, Sang‐Woong
• Is Part Of: ETRI journal. Volume 35:Issue 3(2013)
• Page Start: 554
• Page End: 557
• Publication Date: 2013-06-01
• Subjects: Power amplifier -- power detector -- directional coupler -- metamaterial -- transformer; Telecommunication -- Periodicals; Electronics -- Periodicals; Electronics; Telecommunication; Periodicals; Periodicals; 621.38205
• DOI: 10.4218/etrij.13.0212.0350
• Languages: English
• ISSNs: 1225-6463

Abstract

Abstract : This letter presents a power amplifier (PA) with an on‐chip power detector for 2.4‐GHz wireless local area network application. The power detector consists of a clamp circuit, a diode detector, and a coupled line directional coupler. A series inductor for an output matching network in the PA is combined with a through line of the coupler, which reduces the coupling level. Therefore, the coupler employs a metamaterial‐based transformer configuration to increase coupling. The amount of coupling is increased by 2.5 dB in the 1:1 symmetric transformer structure and by 4.5 dB from two metamaterial units along the coupled line.