1. Introduction A direct broadcasting satellite(DBS) service via Koreasat 3 is currently provided and there are many subscribes for a residential house. In addition, many people want to watch the DBS TV even at vehicles because it has advantages over terrestrial TV broadcasting with high quality, simultaneity, wide coverage, and so on. Several antenna systems for mobile DBS reception have been ...

A novel process for monolithic integration of RF MEMS switches with three-dimensional (3-D) antenna elements on a microwave laminate printed circuit board (PCB) is presented. This process calls for a low temperature (90-170C) high-density inductively coupled plasma chemical vapor deposition (HDICP CVD) technique that allows the choice of any PCB substrate, such as RO4003-FR4 (εr=3.38, tanδ=0.00...

We discuss results of low noise amplifier Monolithic Millimeter-wave Integrated Circuits (MMICs), which were designed for specific frequencies in the range of 70-200 GHz. We report on room temperature and cryogenic noise performance for a variety of circuits. The designs utilize Northrop Grumman Corporation’s (NGC) 35 nm gate length InP HEMT technology. Some of the lowest reported noise figures...

Reconfigurable microwave filters make microwave transceivers adaptable to multiple bands of operation using a single filter, which is highly desirable in today’s communications with evermore growing wireless applications. Tunable filters can replace the necessity of switching between several filters to have more than one filter response by introducing tuning elements embedded into a filter topo...

On-chip distributed transmission line resonators in CMOS technology have become the interest of research subjects recently (Ono et al. 2001; Umeda et al., 1994; Kanaya et al., 2006; Wolf, 2006) because of their size which becomes more compact, as the frequency of application increases. Among the various transmission lines, coplanar waveguide (CPW) has more engineering applications (Toyoda, 1996...

New RF circuit techniques have overcome the distortion problems for low supply voltages. The RF IC chip-set for the 1.9 GHz Japanese Personal Handy Phone (PHP) system includes a low noise amplifier (GaAs MMIC), a mixer (GaAs MMIC), a linear power amplifier (GaAs MMIC), a T/R switch (GaAs MMIC), a 1.9 GHz direct-conversion quadrature modulator (Si LSI), and a frequency synthesizer (Si LSI). Thes...

In this paper a monolithically integrated frequency tripler based on an antiparallel pair of Schottky diodes is presented. The tripler is designed for flat output power response and wide frequency range. With 2 mW of input power the tripler covers the frequency range of 75 – 140 GHz (bandwidth 60 %) delivering output power between -19.4 dBm and -14.7 dBm with an average efficiency of 1.1 %. The...

In this work, the approach of the distributed transversal filter for Optical CDMA systems is addressed. It demonstrates that pulse generation and correlation functions can be accomplished in the electrical domain for multi-Gbit/s systems. The practicalities of the approach were assessed using a state of the art GaAs MMIC process. A innovate transversal filter, which is termed the dual drain-lin...

Drastic cost reduction of phased-arrays will require a shift in design strategy. The emphasis must be on removing expensive active components, not developing more highly integrated components or exotic packaging techniques. The phase shifter circuit—an essential active component—is the primary obstacle in decreasing the cost and number of active components in a phased-array. The problem is mult...