Usha Kiran Kommuri

Design and simulation of wideband patch antenna for wireless application

In this paper L-strip Electromagnetically coupled rectangular patch antenna is proposed and simulated results were obtained by HFSS tool. The frequency range covered by this single antenna is 1800 MHZ to 2370 MHZ with -10db return loss with optimal height of the patch from the ground plane 16.8mm. The antenna parameters which influence the gain, bandwidth, return loss was analyzed and graphs are plotted. The design mainly focuses on 3G internet services. It covers the DCS, PCS and UMTS. In addition, significant matching and high gain of 10.8 dB at 2.4GHz is obtained.

Broadband and high gain low profile(thin) capacitive-coupled microstrip antennas for wireless applications

Broadband antennas that are small in size and simple in structure are typically demanded for such applications. In this paper, we present two prototypes of microstripline fed capacitively coupled microstrip antennas. First prototype consists of microstripline fed capacitively coupled for broadband antenna at 2.5 GHz. This bandwidth is 11 times greater than conventional microstrip antenna (MSA). Here, air-gap (Δ) of 7 mm is used between the ground plane and the substrate. The second prototype antenna is a high gain low profile gap-coupled microstrip antenna consisting of a slot in the radiating patch. The location of the slot is placed in an appropriate location in order to get high gain. Using radiating slot in the patch gain has been enhanced significantly over convention antenna. The obtain gain is 9.73 dB.

Design of miniaturized dual polarized MIMO antenna

This Work Presents the design of two different antenna. First, a Microstrip patch antenna with different shapes of cut in slot is designed. In order to increase the bandwidth and to obtain Dual polarization power divider having 50, 70 and 100 Ohm transmission line is fed in vertical and horizontal direction to the designed antenna. Second, a Serpinski Gasket antenna is designed for a working bandwidth of 5.1–5.8 Ghz A comparison is done between a antenna properties like frequency, return loss and gain of the two designed antennas.

Miniaturizing of RF MEMS DMTL phase shifter

Micro-electro-mechanical frameworks (MEMS) Technology has risen as a key methodology for building low-misfortune stage shifters, which is crucial for cutting edge radar and correspondence frameworks. This MEMS innovation is utilized as a part of stage shifters, which are vital for advanced telecom, car, and protection applications. The principle idea here is to evacuate every single existent capacitance of an inductor, as it is in the planar conductor, including controllable capacitor in parallel with the unadulterated inductor to create no good disseminated coplanar waveguide stage shifter. The reverberation state of the additional controllable capacitors makes extensive variety of working zone to accomplish expansive stage moving per unit cell. Utilizing this technique the quantity of cells is diminished. Accordingly size and misfortune are diminished.