Abstract
A scattering technique for measuring reactive antenna input impedance is
described. The antenna scattering is measured with three different
loads: an open circuit, a conjugate match, and a reactive match. The
load reactances tune the antenna into resonance at the measurement band.
Theory and error considerations are presented, as well as measurement
results of two ultra high frequency radio frequency identification
antennas. The measurements were performed in a gigahertz transverse
electromagnetic mode cell. The measured impedances are within about 10%
of the simulated values for a dipole-like antenna. The results of a
planar inverted-F antenna are somewhat more complex, but also supported
by the presented simulations and the coaxial impedance measurement
results.
| Original language | English |
|---|---|
| Pages (from-to) | 469-474 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 56 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2008 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- Antenna impedance
- backscattering
- radio frequency identification (RFID)
- ultra high frequency (UHF)