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In this paper, electrically small slot antenna with a transmission line based impedance matching circuit have been designed. Moreover, the proposed antenna is mounted on the 2.4GHz-band sensor node system. The antenna size is 3.1mm x 13.1 mm and total sensor node sizes is 35mm x 35mm, respectively. Proposed ESA is very advantageous for miniaturization of RF devices.
This paper describes the design of a 2.4-GHz CMOS Class E single-ended power amplifier (PA) for wireless applications in TSMC 0.18-μm CMOS technology. The Class E PA proposed in this paper realizes all inductors with bondwires for the higher quality factor to increase PA performance and to reduce chip size. The single-ended topology is employed because most existing components designed to be driven...
In this paper, we designed and tested ESAs with impedance matching circuits having different gain. We succeeded in implementing the circuit which matches the small radiation resistance of ESA to amplifier. Measured results are close to the simulation value. So we proved possibility to design and fabricate ESA with high radiation efficiency.
A voltage-controlled oscillator (VCO) employing on-chip coplanar waveguide (CPW) resonator is proposed for 2.4GHz wireless applications and comparative study between the proposed VCO and a conventional VCO which is composed of LC-tank resonator (LC-VCO), is carried out. By comparing the measured results on the fabricated chip on TSMC 0.35 mum BiCMOS technology, it has noted that the VCO employing...
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