In this paper several developments in RF front end technology based upon the active antenna concept are presented. RF front ends utilizing active antenna concepts have shown improvements in such areas as power added efficiency, compactness, low noise figure, and increased func-tionality. These improvements are illustrated in this paper with a Class F transmitter with integrated circular patch a...

Antipodal Fermi antenna (APFA) that uses an antipodal feeding section is proposed and its fundamental characteristics are presented. It is shown that the cross polarization level is decreased by 5–10 dB by the presence of the corrugation. It is also found that high gain, low VSWR and low side lobes and low back lobes are obtained. The mechanism of operation principles is discussed by using FDTD...

In this review paper, author have shown comparison of various techniques available to modify the parameters of microstrip patch antenna. MPA is generally used in modern communication devices. Study of literature of past few year shows that, the leading work on MPA is focused on designing compact sized broadband microstrip antenna. Author investigated various research paper published to modify t...

1. INTRODUCTION There is a great demand for broadband antennas used for many applications such as the ultra-wideband (UWB) communications, the EMI measurements and the wideband radars. Considering the transmission and reception of pulse signals, not only broadband characteristics of input impedance and radiation pattern but also the distortionless condition are required. Among many types of bro...

This paper presents a comparative study of rectangular base desktop shaped broadband patch antenna (Antenna1) and triangular base desktop shaped broadband patch antenna (Antenna2). Apart from base dimensions all parameters of both antennas are constant. The broadband characteristics are achieved by introducing two parasitic ground planes and notches are etched on the radiating patch. Both anten...

The paper briefly reviews the historical background of dielectric resonator antenna and its bandwidth enhancement techniques. The main focus is on a compact DRA that can offer broad band operation. It has been illustrated that dual resonance and multi resonance operation can be much effective to give wide band characteristics of DRA. Index Terms dielectric resonator antenna, broadband, multi re...

In this work, an electronically tunable large range phase shifter based on a broadband Injection-Locked Third Harmonic SelfOscillating Mixer (IL3HSOM) is designed and analyzed. This multifunctional circuit generates a down-converted Intermediate Frequency (IF) signal and provides a theoretical 540◦ continuous phase shift range. The conversion gain and the bandwidth of the circuit are optimized ...

Broadband wireless access operating in the microwave and millimeter-wave frequency windows has been actively investigated for future ultra broadband communications. The drastic increase in the throughout of each base station in these systems necessitates the use of an optical fiber backbone to provide broadband interconnections between the central office and all the antenna base stations. With ...