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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.
Published in:
Antennas and Propagation, IEEE Transactions on
(Volume:56
,
Issue:
2
)
Date of Publication: Feb. 2008
- Page(s):
- 469 - 474
- ISSN :
- 0018-926X
- INSPEC Accession Number:
- 9778281
- Digital Object Identifier :
- 10.1109/TAP.2007.915425
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 07 February 2008
- Issue Date :
- Feb. 2008
- Sponsored by :
- IEEE Antennas and Propagation Society
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