Active integrated antennas (AIAs) provide a new paradigm for designing modern microwave
and millimeter-wave architecture with desirable features such as compactness, light weight …

Microstrip patch antennas were first proposed in the early 1970s and since then a plethora
of activity in this area of antenna engineering has occurred, probably more than in any other …

This paper provide a review of the active integrated antenna (AIA) technologies. After a brief
introduction on the definition and some historical remarks, the paper concentrates on the …

Two class AB GaAs field-effect transistor (FET) power amplifiers have been designed and
fabricated in the 4.4-4.8 GHz range. In the first case, a dielectric PBG line was incorporated …

A microstrip antenna design that effectively attains circular polarization (CP) and harmonic
suppression is proposed. By modifying the size and position of two peripheral cuts, two …

This paper presents three novel architectures for high-efficiency amplifiers relying on new
harmonic-tuning techniques. These methods yield high-efficiency power amplifiers and …

This article provides a tutorial and review of recent developments in high-efficiency class F
RF/microwave PAs. The principles of class-F RF PAs are explained first. Recent progress in …

In this paper, microstrip-fed slot antennas with suppressed harmonics are proposed. To
obtain this operation, conductor lines connected with ground plane are inserted in slot …

A novel fully integrated transmitter front-end with a simple structure is proposed to obtain
both high power-added efficiency (PAE) and a compact RF-front structure. To have all these …

This chapter describes a series of novel concepts to increase microwave power amplifier
efficiency. Within modern wireless systems, power amplifiers must meet exacting linearity …