Research Article
An UHF RFID Reader Antenna with Multitag Identification for Extremely Low-Temperature Medical Systems
Table 1
Measured radiation performance of the reader antenna.
| | Frequency (MHz) | Gain (dBic) | AR (dB) | HPBW (deg) | F/B ratio (dB) | Efficiency (%) | | Bore sight | Bore sight | yz-plan | xz-plan | yz-plan | xz-plan |
| | 902 | Sim. | 0.6 | 0.82 | 90° | 68° | 11.8 | 12 | 38 | | Mea. | 0.53 | 0.8 | 94° | 70.81° | 12 | 12.67 | 30.3 |
| | 920 | Sim. | 1.92 | 1.02 | 72° | 65° | 10.08 | 11.23 | 52 | | Mea. | 1.03 | 1 | 80° | 70.51° | 11 | 11.97 | 46.9 |
| | 928 | Sim. | 1.2 | 0.88 | 70° | 66.5° | 9 | 10.72 | 41 | | Mea. | 0.98 | 0.8 | 75° | 70.09° | 9.6 | 10.98 | 39.43 |
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