Investigation for impact behavior of composite surface antenna
We study the impact characteristic and the performance of composite surface antenna (CSA). The antenna, which operates in GPS band (1.575 GHz) and DMB band (2.635 GHz), was embedded in composite sandwich structure consisting of glass/epoxy laminate, carbon/epoxy laminate, adhesive films and nomex honeycomb. When 20 J of impact energy was applied to arbitrary points on the antenna, the maximum contact force was 4 kN and the antenna proved resistant to impact. The gain of antennas after impact testing was about 6 dBi in GPS band and 4.5 dBi in DBS band.
Impact damage and antenna performance of conformal load-bearing antenna structures
Experimental investigations into the impact response and damage of conformal load-bearing antenna structures composed of a face-skin, a core and a ground plate have been carried out. The damage was examined using non-destructive and destructive methods. The performance of the damaged antenna structure was investigated by measuring the return loss and the radiation pattern in a laboratory compact range. We found that the antenna performance was related to the impact damage, and that there exists a threshold in the impact energy above which the antenna fails to function. For the structure that we studied, the threshold of the impact energy for correct antenna function was between 1.5 and 1.75 J.
Fabrication and measurement of a compact meander‐line‐type microstrip patch antenna with shorting pin for the 5‐GHz band
This paper investigates the characteristics of the modified meander‐line‐type patch antenna for the 5‐GHz band. Its design was based on a modified meander line width and shorting pin with coaxial feeding. Its maximum measured impedance bandwidth (−10 dB and below) reaches approximately 1.64 GHz (4.765–6.405 GHz). Radiation patterns at different frequencies are also discussed, and the measured gains are about 5.74 to 9.09 dBi. © 2006 Wiley Periodicals, Inc. Microwave Opt Technol Lett 48: 944–947, 2006; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.21527