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Active integration ring antenna/phase shifter with annular ring slot for 5‐GHZ WLAN direct conversions
Author(s) -
Liu JiChyun,
Soong TaWei,
Chang DauChyrh,
Chen JongYih
Publication year - 2005
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.21205
Subject(s) - phase shift module , ring (chemistry) , microwave , electrical engineering , bandwidth (computing) , schottky diode , engineering , slot antenna , antenna (radio) , optoelectronics , diode , microstrip antenna , electronic engineering , materials science , telecommunications , chemistry , organic chemistry
A compact active ring antenna integrated for direct conversion or zero‐IF detection is presented in this paper. The ring antenna with annular ring slot exhibits wide‐bandwidth and high‐gain performances. Meanwhile, the ring acting as a phase shifter provides the necessary 90° characteristics to operate with I/Q signals for direct conversions. Two Schottky diodes are connected to the ring structure and used as the mixer. Conversion gain G iso = 4.2 dB. The work is the case at 5.0 GHz for WLAN applications. © 2005 Wiley Periodicals, Inc. Microwave Opt Technol Lett 47: 475–480, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21205