Hanyi Ding

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This paper presents a tunable transmission line (t-line) structure, featuring independent control of line inductance and capacitance. The t-line provides variable delay while maintaining relatively constant characteristic impedance using direct digital control through FET switches. As an application of this original structure, a 60 GHz RF-phase shifter for(More)
Feasibility of wideband on-chip RF switch operating at millimeter wave frequencies using PIN diodes in IBM .13 mum SiGe technology is demonstrated. A SPDT reflective switch targeting 60 GHz wireless and radar applications is designed, fabricated, and measured. Good correlations between simulation and hardware are reported. Measured data show 2.0 to 2.7 dB(More)
RF designs such as phased array antenna systems make use of on-chip electronically controllable delay elements. This paper presents simulations and measurements of on-chip variable delay transmission lines with fixed characteristic impedance in two different technologies. EM simulations in a 130 nm BiCMOS technology show a delay change of 15.6 % is possible(More)
In this paper, we introduce an isolated RF LDMOS NFET is for RF Power Amplifier (PA) and power management applications. The RF LDMOS NFET has demonstrated a drain-source turn-on resistance (R<sub>ds,on</sub>) of 1.45ohm-mm, a cutoff frequency (Ft) greater than 40GHz and a drain-source breakdown down voltage (BV) in excess of 9V. For PA designs, the(More)
—Although the discontinuity structures in the microstrip transmission lines such as a gap and bend have been largely studied, the three-dimensional edge effects, skin effects and metal losses have hardly been analyzed. In this paper, modeling of transmission line with bend and gap discontinuity with equation based process technology independent method are(More)
— This paper presents a novel on-chip passive bandpass filter for millimeter-wave (MMW) applications that utilizes a pair of electrically-coupled thru-silicon vias (TSV). The presented TSV bandpass filter can be used in MMW applications such as radar, medical imaging, and communication. The TSV bandpass filter uses two TSVs to extend two(More)