✦ LIBER ✦
An accurate method to measure the antenna impedance of a portable radio
✍ Scribed by Y. L. Chow; K. F. Tsang; C. N. Wong
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 128 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
✦ Synopsis
Traditional impedance measurement of a monopole antenna is inaccurate due to a likely stray radiating current on the measuring cable that is also affected by the operating human. This letter demonstrates experimentally that the elimination of this stray current is possible by using a special slee¨e balun suitable for ¨aried PCB groundplane and human postures. Adjustment of the balun position is discussed.