This paper presents a submillimeter-wave (submm-wave) / terahertz (THz) push-push Colpitts oscillator that supports very low-voltage operation in 70-nm GaAs pHEMT technology. The oscillator core emplo...
This work reports on the design and implementation of the first integrated, balanced frequency quadrupler operating in the 480–530 GHz frequency range, with measured efficiency of 4.9% and correspondi...
This paper presents the realization and validation of metallized 3D-printed WR-1.0 (750–1100 GHz) hollow rectangular waveguide components. The components are fabricated as 15 mm long H-plane split-blo...
The FlexRadio “Aurora” is a state-of-the-art amateur-radio transceiver that operates from 1.8 to 54 MHz, producing 500 W output with an overall efficiency of 80 percent. Employing a combination of env...
This paper presents a design methodology for high-efficiency VHF Class-Φ₂ power amplifiers with a GaN-based sinusoidal resonant driver. While LDMOS devices are robust for the 10–20 W power level, thei...
We present a highly efficient, all-digital GaN-based power amplifier (PA) for compact, frequency-tunable transmitters. Using a look-up-table (LUT) based pulse encoder (PE) and a differential input of ...
Radio-frequency (RF) high-power (>= 500 W) plasma systems require fast, tunable impedance matching. However, conventional variable vacuum capacitor (VVC)-based networks suffer from slow mechani...
A novel Class‑G balanced power amplifier architecture is presented that enhances efficiency and robustness under severe antenna VSWR by adaptively reducing the drain supply voltage when the RF voltage...
Highly-miniaturized input-quasi-reflectionless bandstop filters (BSFs) are reported. They are based on a complementary RF diplexer design approach where the bandstop branch is formed by cascaded short...
This paper presents a passband flatness optimization framework for low quality factor (Q) filters using lossy coupling matrix (CM) synthesis. A lossy CM synthesis method is first proposed in the compl...