A circularly polarized antenna, realized in a low-cost technology with an integrated feed, is presented for the land-mobile satellite seruice. This antenna presents large bandwidth, high gain, and good axial ratio in all frequency ranges.
Broadband circularly polarized microstrip antenna with a dual-perpendicular feed
β Scribed by Mon-Chun Pan; Kin-Lu Wong
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 131 KB
- Volume
- 24
- Category
- Article
- ISSN
- 0895-2477
No coin nor oath required. For personal study only.
β¦ Synopsis
Figure 4 Signal gain and noise figure as a function of laser wavelength
The effects of the laser wavelength on the probe signal at s 1550 nm are given in Figure 4. As mentioned earlier, s the presence of an oscillating laser signal within the wavelength range of 1528α1533 nm reduces the upper level population. Since the gain is population, dependent, given by Ε½ .
π SIMILAR VOLUMES
## A new and simple technique for obtaining circular polar-( ) ization CP radiation of a single-feed microstrip antenna is demonstrated. This CP design is achie¨ed by insetting a single slit to the boundary of the microstrip patch, and placing a single feed along an axis 45Рto the one containing
Simply by loading the microstrip antenna at a suitable ( ) position using a single chip resistor, circular polarization CP radiation can be obtained with a single feed. In addition, this design can also pro¨ide an enhanced CP bandwidth. Results of the proposed CP design applied to circular and recta
Figure 10 Loci of frequency and location versus distance where double nulls and strong double dips are occurring for x s y10 m in s Ε½ . Ε½ . the lossless dielectric media of β s 1.8, 2, 3. a Frequency. b r Location dip separation distance converges to the cavity size as the source point approaches th
A no¨el design of a probe-fed stacked microstrip antenna ( ) for obtaining dual-band circular polarization CP radiation is presented. By properly selecting two elliptic patches of different axial ratios in the proposed design, and introducing a small air-gap layer between the two patches, dual-band