In battery-powered embedded systems, dedicated circuitry is used to convert stored energy into a form that can be directly used by processors. These power regulation devices seek to mask non-ideal aspects of the battery and present an ideal, fixed-voltage power source to the processor. However, this comes at a high price in terms of form factor, component… (More)
Design trade-offs are presented for varactor-based variable phase-shifters in terms of size, tuning range, bandwidth/phase linearity and large-signal performance. Based on this study, a compact, low-loss (0.6dB/90° @ 1.0 GHz), wideband and extremely linear varactor-based phase shifter is presented.
In this paper, a planar three-way power divider with compact size is presented using quarter-wave long five-conductor couple line. It is analytically proved that the proposed structure allows the performance of three-way power dividers. Based on the derived equations and simulation, the three-way power divider is designed and measured at 2.0 GHz. The… (More)
—A varactor-tuned continuously variable phase shifter based on an all-pass network is presented. Design equations for this phase shifter network are derived and presented. The phase shifter achieves an IIP3 of 52dBm with 10MHz tone-spacing at 2GHz and loss of 2.3-3.7dB with continuous 180 • phase shift at 2GHz. The total chip size including pads is 2900µm X… (More)