Research Article
Tunable Compact UHF RFID Metal Tag Based on CPW Open Stub Feed PIFA Antenna
Table 1
Requirements for designing a UHF RFID tag antenna.
| Requirements of UHF RFID tag antenna design | Effects of improvement | Read range | Cost | Reliability |
| (1) Good impedance matching | √ | | | (2) High antenna gain | √ | | | (3) Wide bandwidth | √ | | √ | (4) Broadside radiation pattern | √ | | √ | (5) Compact size and shape | | √ | | (6) Low manufacture cost | | √ | | (7) Easy for testing and tuning | √ | √ | √ | (8) Stable performance for use | √ | | √ |
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