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Unlike metal antennas, an antenna that is composed of plasma can switch its operation/non-operation by turning the plasma on and off. In this paper, we propose a monopole plasma antenna that operates as a radiator in the C-band. The antenna was designed and considered using numerical calculations and measurements. The simulated and measured results were in good agreement. The directivity was similar...
Electrically small antennas are needed to lower further the cost of wireless elements. However, the antenna gain is constrained to the Harrington limit, while the impedance matching and directivity characteristics deteriorate in electrically small antennas. Using a dipole antenna loaded with a left-handed ladder structure is a promising technique for reducing the size of antennas. Reported is the...
Transmitter, receiver antennas, and other components monolithically integrated with CMOS LSIs are in high demand as a means of reducing the cost of wireless equipment. For the first step, an RF frontend (low-noise-amplifier [LNA] and mixer) has been designed for use in the 3.1 to 10.6-GHz band compatible with multi-band OFDM UWB all group spectrum allocation. We clarify the design methodology of antennas...
On-chip antennas are demanded to further lower the cost of wireless CMOS ICs. We placed an artificial dielectric layer (ADL) between an antenna and Si substrate to improve the antenna gain. A 3.1-10.6-GHz ultra-wideband inverted-F antenna with ADL as well as a low-noise amplifier were designed and fabricated using a 0.18-??m mixed signal/RF CMOS process with one poly and six metal layers. A fairly...
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