Microstrip patch antennas are intrinsically narrow bandwidth devices, i.e. less than 10 %. Special techniques are always applied in order to increase their bandwidths. These include complicated wideband balun impedance transformers and parasitic elements. Abdelaziz reported a 10 GHz dual-element microstrip patch antenna design which was printed on a 1.6 mm thick Duriod substrate [1]. The two el...

We consider here how to build a balun for f%st-nsetime pulses at high vokage. We are concerned with signals with risetimes on the order of 100-200 ps, with high peak voItages and peak powers. We propose the simplest method is a coaxial unzipper. We consider dielectric strength and maximum coaxial radius allowable while still maintaining the risetime. Also considered are methods to reduce the co...

The demand for radio frequency (RF) transceivers operating at 2.4 GHz band has attracted considerable research interest due to the advancement in short range wireless technologies. The performance of RF transceivers depends heavily on the transmitter and receiver front-ends. The receiver front-end is comprised of a low-noise amplifier (LNA) and a downconversion mixer. There are very few designs...