With many frequency bands previously allocated solely for radar now being reallocated for
sharing, radar transmitters must be frequency-agile, able to quickly change operating …

Many frequency bands, previously allocated solely for radar, are being designated for
sharing. Future radar transmitters must adaptively share the frequency spectrum with …

Spectral efficiency has become increasingly important in the modern congested spectral
environment. Directional modulation multiplexing helps by using spatial diversity to transmit …

A data-driven projected gradient descent method is proposed to minimize the input reflection
coefficient of a tunable matching network. The approach selects the network's two varactor …

The analysis and application of three different optimization algorithms are presented for
tunable RF systems along with a comparison of the different tuning control schemes. These …

The theory of coupled-resonator-based impedance tuners is presented for the first time,
establishing coverage limitations for two-and three-resonator designs. Besides the …

With many midband spectrum reallocations for fifth-generation (5G) wireless
communications causing a congested spectrum, flexibility in high-power transmitter system …

This paper presents the radio frequency (RF) design and experimental validation of a
multifunctional bandpass filtering (BPF) concept with center frequency tunability and RF …

This paper introduces a new technology for a high-speed, high-power mobile form-factor
tuner utilizing gas discharge tube plasma cells as switching components. To the best of our …

Due to increasing congestion in the radar frequencies due to reallocations, the pressure
upon radar systems to avoid interference through dynamically changing operating frequency …