This paper presents the design, simulation, and preliminary measurement of a passive (battery-free) frequency doubling antenna sensor for strain sensing. Illuminated by a wireless reader, the sensor consists of three components, i.e. a receiving antenna with resonance frequency f0, a transmitting antenna with resonance frequency 2f0, and a matching network between the receiving and transmitting...

The subsequent sections present a new single antenna attitude system based on signal strength. By incorporating a precisely measured spherical antenna gain pattern and a GPS transmission model, attitude can be estimated using a least square search. Finally, the improved attitude system is analysed by comparing to previous results. This paper concludes that further analysis is required for model...

Accurate and efficient channel estimation is important in multiple-antenna communication systems in order to effectively reduce the mutual interference among different transmitting antennas. For a nondispersive channel that is modeled by a single tap for each transmitting and receiving antenna pair, the well-known Hadamard sequences can be applied to estimate the channel coefficients. However, ...

Several wideband antennas are presented for either wireless application. This paper presents the performance of a simple monopole antenna loaded with an annular dielectric resonator as a wideband transmitting/receiving antenna. By adjusting the length of the monopole and load arm, a 10-dB bandwidth of 94% is achieved while maintaining monopole-like radiation pattern, which covers UWB applicatio...

We report achieving a noise figure of 5.7 dB at 12 GHz in an amplifierless photonic receive link. This result enables a new transmit/receive interface called TIRx (TransmitIsolating Receiver) that isolates the transmit and receive signal paths by ≥ 40 dB over > 3 decades of bandwidth, allowing an antenna to receive small signals while simultaneously transmitting high-power signals through the s...

A pair of coupled gold nanorods excited by a beam of free electrons acts as a transmitting Hertzian antenna in the optical part of the spectrum. Significantly enhanced resonant emission is observed from the antenna when the electron beam is injected around the junction between the rods, where the local density of electromagnetic states is elevated.

This paper presents a two-port antenna including a receiving port and a transmitting one in the same volume. These two antennas are physically integrated and electrically isolated. The receiving antenna is a linearly polarized narrowband slot for energy harvesting, whereas the transmitting one is a circularlypolarized ultrawideband (UWB) quasi-spiral for signal radiation. The measurement result...