Download Antenna Handbook - Fundamentals and Mathematical Techniques by Y.T. Lo, S. W. Lee PDF

By Y.T. Lo, S. W. Lee

Quantity 1: Antenna basics and Mathematical suggestions opens with a dialogue of the basics and mathematical ideas for any form of paintings with antennas, together with simple rules, theorems, and formulation, and methods. DLC: Antennas (Electronics)

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5. 6: A switched high-pass filter phase shifter may result in less insertion loss. In the bypass state, SW1 shorts out the series capacitor, SW2 opens and disconnects the shunt inductors L from ground. In this way, the input signal is bypassed to the output. In the high-pass state, SW1 opens and SW2 shorts, and the high-pass π filter is realized. The high-pass filter’s values are chosen such that it provides the required transmission phase while it has almost no effect on the amplitude in the high-pass state.

However, it is still difficult to implement such a phase shifter at mm-wave frequencies due to the limitations of MOSFET switches. 5 Traveling-Wave Phase Shifters Different phase shifts can also be achieved by interpolating the signal from different locations of a transmission line. 7 shows a travelingwave phase shifter [44, 54], which is also called a distributed phase shifter 44 CHAPTER 4. 7: Concept of a traveling-wave phase shifter since it uses a technique that is also used in a distributed amplifier.

The phase shifter consists of a differential transmission line loaded with a differential MOS varactor at each side. The cross-sectional view of a differential MOS varactor is shown in Fig. 3. The top and bottom plates of the varactor are formed by the poly gates Y. V. 2011 47 48 CHAPTER 5. 2: Schematic of a differential phase shifter consisting of a differential transmission line loaded with a differential varactor at each side and n-well. The differential gate terminals of the varactor are connected to the transmission line and the n-well of the varactor is connected to the DC control voltage.

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