Very low frequency communication systems (3 kHz–30 kHz) enable applications not feasible
at higher frequencies. However, the highest radiation efficiency antennas require size at the …

This paper proposes a transmitter system based on direct antenna amplitude-shift keying
modulation for point-to-point microwave link. The proposed system is formed from a …

This paper presents two simple SPICE circuit models of the memristor using two different
kinds of integrators. These models expand and simplify the previous methods of solving the …

Direct antenna modulation (DAM) methods using time-varying matching networks offer the
possibility to reduce the detrimental effects on broadband signal transmission from a …

An antenna capable of directly phase modulating a radio frequency (RF) carrier is
discussed, designed, and measured as both an antenna and a modulator. Access point …

The characteristics of a narrowband antenna transmitting a broadband on-off-keyed signal
using direct antenna modulation (DAM) are studied. The DAM technique has previously …

Magnetic materials have a long history of usage and play an important role in modern
instruments or devices like motor, electrical generator, and transformer, etc. With the …

Bounds on the frequency domain behavior of electrically small antennas are adapted to
assess the time-domain distortion or fidelity achievable by simple linear time-invariant (LTI) …

Relative bounds on radiation efficiency are established for time-modulated antenna
systems, where radiation is generated by broadband conduction currents impressed using …

The lower limit on the radiation quality factor or Q factor also known as Chu's limit results in a
very narrow bandwidth of an electrically small antenna. This Q factor or bandwidth limit …