illumination on S 21 near pinch-off voltage. As the input optical power is increased, the forward gain is also increased. However, the phase of S 21 is insensitive to illumination, as is evident from Figure 4. Further, we plotted the variation in the remaining parameters (S 12 , S 22 ) with illumina
Control of the impedance bandwidth of wideband planar monopole antennas using a beveling technique
✍ Scribed by M. J. Ammann
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 168 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0895-2477
- DOI
- 10.1002/mop.1273
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Wideband planar monopole antennas have recently been proposed for use on digital mobile terminals. The square planar monopole is the simplest to analyze, and suffers little degradation of radiation pattern within the impedance bandwidth. The addition of a bevel on one or both sides of the feed probe is shown to increase the bandwidth with good control of the upper edge frequency. The impedance bandwidth ratio for this antenna is shown to vary from 2:1 to 6:1, which can be controlled by beveling the planar geometry. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 30: 229–232, 2001.
📜 SIMILAR VOLUMES
## Abstract This paper presents a new technique to improve the impedance bandwidth of a rectangular planar monopole. The method involves beveling one part while keeping the other edges near the ground plane, which is connected to the antenna‐feeding port. The measured impedance bandwidth of the mon
## Abstract Significant effects of ground‐plane dimensions on the impedance bandwidth of a planar inverted‐F antenna for a UMTS (1920–2170 MHz) mobile handset are presented. Experimental results show that, by varying the ground‐plane length, the antenna studied can have an impedance bandwidth (10 d