The development of X-band klystrons at SLAC originated with the idea of building an X-band Linear Collider in the late 1980’s. Since then much effort has been expended in developing a reliable X-band Power source capable of delivering >50 MW RF power in pulse widths >1.5 μs. I will report on some of the technical issues and design strategies which have led to the current SLAC klystron designs.

A large, ultra lightweight space structure, such as solar sails and Gossamer spacecrafts, requires a distributed power source to alleviate wire networks, unlike the localized on-board power infrastructures typically found in most small spacecrafts. The concept of microwave-driven multifunctional capability for membrane structures is envisioned as the best option to alleviate the complexity asso...

RF power output has been a major planning aspect for engineers since the start of radio transmission. Undoubtedly important, RF Power level is only one of many factors that determine a successful wireless network. To effectively evaluate and differentiate between various microwave systems and link performance, operators should be able to examine several key aspects of RF power output. Propagati...

We have experimentally studied emission of microwave radiation from a monopole source embedded in a three-dimensional photonic crystal. We have demonstrated enhancement of microwave radiation at the band edge and cavity mode frequencies. Furthermore, we have shown that it is possible to obtain highly directive microwave radiation sources operating at the band edge of the three-dimensional photo...

This article deals with the nonlinear memory effects observed on both AM/AM and AM/PM conversions and swept frequency-separation two-tone intermodulation-distortion (IMD) tests made on microwave power-amplifier (PA) circuits. This study is theoretically introduced via an analytic Volterra series analysis, then complemented with large-signal harmonic balance and envelope simulations of a GaN HEM...

The amplitudes of peaks in the angular power spectrum of anisotropies in the microwave background radiation depend on the mass content of the universe. The second peak should be prominent when cold dark matter is dominant, but is depressed when baryons dominate. Recent microwave background data are consistent with a purely baryonic universe with Ωm = Ωb and ΩΛ ≈ 1. Subject headings: cosmic micr...

A solid-state microwave generators system is considered as an alternative to the magnetron, in order to inject electromagnetic energy into the cavity of a microwave oven for domestic use. Over current devices, the use of solid state technology allows to control the frequency and phase of the electromagnetic field generated. Considering a simplified cavity with 2 solid state sources, the influen...

In this study, a proposed Microwave-Induction Heating (MIH) scheme has been systematically studied to acquire suitable MIH parameters including chamber pressure, microwave power and heating time. The proposed MIH means that the thin indium tin oxide (ITO) metal below the Poly(4-vinylphenol) (PVP) film is heated rapidly by microwave irradiation and the heated ITO metal gate can heat the PVP gate...

The effect of microwave irradiation on DNA/DNA hybridization has been studied under controlled power and temperature conditions. It was discovered that microwave irradiation led to the melting of double-stranded deoxyoligonucleotides well below their thermal melting temperature and independent of the length of the deoxyoligonucleotides. These observations indicate a specific interaction of micr...

The combination of the ionic liquid co-lyophilized lipase and microwave irradiation was used to improve enzyme performance in enantioselective esterification of α-lipoic acid. Effects of various reaction conditions on enzyme activity and enantioselectivity were investigated. Under optimal condition, the highest enantioselectivity (E = 41.2) was observed with a high enzyme activity (178.1 μmol/h...