Referenced Items are not available for this document.
A CMOS power amplifier (PA) with a compact spiral-shaped directional coupler for a mobile UHF RF identification (RFID) reader is proposed here, and its output power combiner and the directional coupler are implemented using an integrated passive device process. The two-chip solution not only enables a CMOS PA to be highly efficient, but also allows the directional coupler and the power combiner to be mounted in a compact standard package. A polar transmitter is implemented using the CMOS PA with the directional coupler to verify the operation of the proposed configuration for a UHF RFID reader. Measurements indicate that the CMOS PA with the directional coupler transmits 27.3 dBm of output with 44.6% of power-added efficiency and that the implemented polar transmitter satisfies the required UHF RFID reader specifications.
Published in:
Microwave Theory and Techniques, IEEE Transactions on
(Volume:59
,
Issue:
11
)
Date of Publication: Nov. 2011
- Page(s):
- 2888 - 2897
- ISSN :
- 0018-9480
- INSPEC Accession Number:
- 12357243
- Digital Object Identifier :
- 10.1109/TMTT.2011.2165962
- Product Type:
- Journals & Magazines
- Date of Publication :
- 26 September 2011
- Date of Current Version :
- 14 November 2011
- Issue Date :
- Nov. 2011
- Sponsored by :
- IEEE Microwave Theory and Techniques Society
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