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In this paper, the design method of an ultra-wideband, surface-mountable frequency doubler is presented. At the input and output paths of the doubler, two ultra-wideband baluns are utilized: microstrip-to-parallel stripline and microstrip-to-CPS baluns. Also, a microstrip-to-CPW transition with vias is used for the surface-mountable transition. The implemented two-layered, packaged frequency doubler...
Various types of ultra-wideband components with 10's of GHz bandwidth have been developed utilizing a uniplanar ultra-wideband balun, which is a simple microstrip-to-coplanar stripline (CPS) transition structure with the operating frequency range from near DC to over 40 GHz. Developed ultra-wideband components include antennas, mixers, doublers and detectors in a carrier type or in a surface mountable...
Ultra-wideband antennas can be systematically and simply designed utilizing a new ultra-wideband planar balun, which is a microstrip-to-CPS (coplanar stripline) transition. The new balun has the operating bandwidth of over 40 GHz. With the proposed balun as an antenna feed, design examples of three types of antennas are presented. Comparisons of simulated and measured results demonstrate validity...
A recently developed ultra-wideband (UWB) balun opens new possibilities for the low-cost, mass-producible, and surface mountable UWB components with 10psilas of GHz bandwidth. The balun is a simple microstrip-to-coplanar stripline transition structure, but a single balun can be designed to have operating frequency range from DC to over 40 GHz. The balun design is based on optimal impedance matching...
A new UWB antenna in bow-tie-type has been designed and implemented by utilizing the new ultra-wideband balun. In order to reduce antenna size, the balun is bended without sacrificing the balun performance. The fabricated antenna provides the operating frequency ranges from 3.2 to 11.2 GHz covering for the whole UWB frequency. The antenna maintains gains from 2.5 - 4.9 dBi for the operating frequencies...
Two types of ultra-wideband tapered slot antennas (TSAs) are designed at millimeter-wave frequencies using the new microstrip-to-CPS transition (balun). Since the antenna feed structure including the balun provides wider bandwidth than TSA antennas, the overall bandwidth of the antenna is not noticeably changed with the feed structure. The designed antennas (LTSA and ETSA) show ultra-wideband performance...
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