✦ LIBER ✦
Active integration ring antenna/phase shifter with annular ring slot for 5-GHZ WLAN direct conversions
✍ Scribed by Ji-Chyun Liu; Ta-Wei Soong; Dau-Chyrh Chang; Jong-Yih Chen
- Publisher
- John Wiley and Sons
- Year
- 2005
- Tongue
- English
- Weight
- 429 KB
- Volume
- 47
- Category
- Article
- ISSN
- 0895-2477
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✦ Synopsis
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 ϭ 4.2 dB. The work is the case at 5.0 GHz for WLAN applications.