We present mm-wave transmission as a complementary technique to characterize the properties of superconducting thin lms, obtaining information on both the real and imaginary part of the dielectric function. Examples are given to illustrate the strength of the technique to measure the response of dielectric materials and strati ed systems. We demonstrate the BCS-behavior of a conventional superc...

satellite thermal control ensures safe operating temperature ranges for satellite components throughout the mission life. effects of altitude, spin, and position of satellite radiator(s) on the thermal control of a small low earth orbit (leo) satellite have been studied. results show that change in satellite altitude, in the range considered here, does not produce critical thermal conditions. h...

This paper proposes a single circular radiator with multi-port (SRMP) antenna that can estimate the direction-of-arrival (DoA) in azimuth and elevation directions. The proposed SRMP is designed to minimize size of ultra-wideband system by using only one patch radiator. To verify feasibility, fabricated, reflection coefficient boresight gain are measured (-13.3 dB 3.4 dBi at 8 GHz). Then, observ...

This research proposes a compact indirect slot-fed wideband patch array antenna for missile seeker application. The proposed single consists of three dielectric layers radiator, an air substrate-integrated waveguide (SIW) cavity, and feeding network. rectangular is used as radiator on the first substrate layer, SIW cavity (ASIWC) employed to obtain high directivity low mutual coupling character...

In this study, we implement attosecond afterburners in an ultrashort soft X-ray free-electron laser (FEL) to improve the performance of generating pulses. scheme, FEL pulse produced normal radiator section is dumped while well bunched electron beam reserved and reused downstream afterburners. Subsequently, radiation gains rapidly as bunching factor current spike large, making much shorter clean...