The Japan Aerospace Exploration Agency (JAXA) plans to launch a geostationary satellite called Engineering Test Satellite VIII (ETS-VIII) in FY 2006. In this paper, a microstrip line array antenna, which has a very simple structure, is introduced to radiate a circularly polarized wave aiming at ETS-VIII applications. This antenna consists of a triangular conducting line with its vertexes rounde...

Microstrip antennas are low in profile and light in weight and they are now developed for many applications. The main difficulty of the microstrip antenna is its narrow bandwidth. Several modern applications like satellite communications, remote sensing and multi-function radar systems will find it useful if there is a dual band antenna operating from a single aperture. Some applications requir...

In this paper, a theoretical model based on the electric field integration method is proposed to analyse radiation properties of slotted annular Leaky-Wave Antenna (LWA), which can generate Circularly Polarized (CP) conical beam or broadside beam. The LWA contains radiating elements arranged along circular travelling-wave structure with equal intervals. By combining and theory, design procedure...

The 440-Mcps conical-scan tracker at the Millstone Hill radar site has been converted to an L-band 12-horn monopulse tracker utilizing a Cassegrain optics reflector system. The amplitude sensing monopulse feed illuminates a 10-foot subreflector and thence an 84-foot-diameter paraboloid with linear or either sense of circular polarization. This system conversion increased the capabilities of the...

A low-cost method to 3D print and metalize circular waveguide components is demonstrated using polylactic acid (PLA) aluminum adhesive backed tape. gradient index (GRIN) lens, an externally metalized thin-walled conical horn, a WR90 rectangular linearly polarized transition are simulated, fabricated, measured. The horn lens were both monolithic prints that metallized simplify the metallization ...