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We present an ultra-wideband bandpass filter with -15dB suppression between 5.15-5.8GHz utilizing second order band elimination filter (BEF). The filter consists of a modified step impedance resonator (SIR) and two interdigital coupled line. Two parallel coupled stubs are attached to the SIR to create a second order BEF, which introduce a sharp and wide enough notch. HFSS was used to optimal the structure,...
A digital-controlled oscillator (DCO) employing on-chip coplanar waveguide (CPW) resonator is proposed for 5 GHz-band wireless communication applications. A 10 bit DCO using on-chip designed, fabricated and tested. By comparing the measured results on the fabricated chip in 0.18 mum CMOS technology, it has noted that the proposed DCO employing on-chip CPW resonator is smaller in size and frequency-tuning...
In this paper, transmission characteristics of the on-chip meander CPW resonator fabricated in TSMC 0.18 um CMOS process is first investigated experimentally and an equivalent circuit is developed. Later, we implemented on-chip CPW resonator to design a VCO for 5 GHz-band wireless applications. One of the advantages of the proposed VCO using on-chip CPW resonator in comparison to a LC-VCO is the chip...
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...
We designed a SiGe BiCMOS 5 GHz-band power amplifier (PA) by using the commercial electromagnetic (EM) and SPICE co-simulator. A new matching circuit composed of conductor-backed coplanar waveguide (CPW) meanderline resonator and impedance inverter is designed. Finally, we designed the 5 GHz PA with CPW matching circuit, spiral inductor, feed line and inductance of the bonding wires by using EM and...
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