AWR eBooks

RF Electronics Chapter 1: Introduction Page 3 2022, C. J. Kikkert, James Cook University, ISBN 978-0-6486803-9-0. For many applications, such IC's may be too expensive for the small number of circuits to be produced, or the performance that can be obtained from an IC cannot meet the required specifications, such as output power or adjacent carrier rejection. For high power applications such as transmitters, IC's alone cannot meet the impedance matching and power demands. As a result, a discrete implementation is often required. This book deals with the design of such RF circuits. Figure 1.4. Harmonic Multiplier, to produce 810 MHz from 162 MHz. [1]. Figure 1.4 is a typical example and shows a harmonic multiplier for a Satellite Beacon Receiver built at James Cook University. The input is a 162 MHz signal and the output is the 5 th harmonic at 810 MHz. The active device is a Microwave Monolithic IC (MMIC) amplifier. Currently wireless services operate at frequencies of 1.8 GHz for mobile phones, 2.5 GHz for Bluetooth and WLAN and 5 GHz for WLAN. In many cases, IC's specially designed for these applications can be used at other frequencies. The designer should keep this in mind as it can reduce the cost of specialised circuits. This book does not specifically deal with the design of RF IC's. The techniques described here are directly applicable to the design of RF IC's and have even been used through microwave and up to millimetre-wave [2 - 4], since those need to allow for the IC to be comparable with the wavelength for GHz frequency designs. In addition, the chapters on amplifiers and oscillators allow for the design of circuits, which can be directly implemented in RF IC's. Computer Simulation For any commercial design, it is important to produce a properly functioning design as quickly as possible. Ideally, there should be just one design iteration, it should be correct and reliable with the first realisation, since any further design-iterations will cost more money and will delay the time before product comes to market, thus reducing any competitive advantage. RF Electronics: Design and Simulation 3 www.cadence.com/go/awr

• Cover