Affiliation:
1. Beihang University, China
Abstract
The emphasis of this chapter is to introduce the design of the integrated circuit package antenna (ICPA), which is a compact and cost-effective antenna design method for RFID reader. The concept, the architecture, and the characterizations of the ICPA will be discussed in details. As differential circuitry dominates in RF transceiver integrated circuit design due to its good performance, microstrip antennas can be seen for use in radio systems with differential signal operation. In this chapter, the improved theory of single-ended microstrip antennas based on the cavity model is expanded to analyze the input impedance and radiation characteristics of the differentially-driven microstrip antennas and ICPA. The occurrence of the resonance for the differentially-driven microstrip antennas, which can be tuned by adjusting the ratio of the separation of the dual feeds to the free space wavelength, will be analysed. Furthermore, the frequency band selection capability of the differential ICPA will be presented.