Ultra-Wideband Systems and RF Modules

**Chapter 2**

**Abstract**

*Albert Sabban*

communication systems

**1. Introduction**

an enemy transmitter.

**25**

Ultra-Wideband MM Wave

Compact wideband RF modules are crucial in mm-wave direction finding systems, radars, seekers, and communication systems. This chapter discusses new integrated wideband mm-wave RF modules. It also discusses the design and development of a compact wideband (18–40 GHz) frontend and a wideband (18–40 GHz) switch bank filter (SBF). The frontend electrical specifications determine the system signal-to-noise ratio and the system dynamic range. This chapter presents a low-cost integrated 18–40 GHz wideband compact frontend with a 47 dBm high power limiter. The frontend consists of two channels: a high gain and low gain channel. Wideband MMIC switches are employed to select the required channel. The gain of the high gain channel is around 27 dB with 1 dB flatness. The noise figure of the module is around 9 dB. This chapter also presents a low-cost, integrated, 18–40 GHz wideband compact SFB module. The wideband SFB consists of three wideband side-coupled microstrip filters. The SFB MIMIC switches operate in the 18 to 40 GHz frequency range and are used to select the required filter. The insertion loss of each filter section is less than 11.5 dB 1.5 dB. The novelty of this research is the development of compact, integrated wideband mm-wave RF

**Keywords:** MM Wave Direction Finding System, Frontend, Filters, Wideband

Design of wideband RF modules, filters, and antennas are presented in [1–12]. Wideband RF technologies such as MIC, MIMIC, and MEMS are presented in [1–7]. Wideband RF modules are crucial in the development of direction finding (DF) systems. A fully integrated 10–40 GHz superheterodyne receiver frontend using a 40–46 GHz IF is presented in [8]. Wideband RF technologies are used to develop wideband RF modules such as frontends, SFBs, and receiving and transmitting channels, as presented in [1–15]. A DF system measures the direction from which a received signal was transmitted. Radio DF is used in the navigation of ships, aircrafts, vehicles, and missiles to locate emergency transmitters for search and rescue, to locate illegal or interfering transmitters, and to track wildlife. The transmitted signal direction may be found by combining the direction information from two or more suitably spaced receivers by using triangulation. Triangulation is the process of determining the location of a point by forming triangles. Triangulation involves only angle measurements. A DF system provides the ability to locate the position of

System and RF Modules

modules for direction finding and communication systems.
