in recent years, the plasma antenna is a new technology for replacing the metal antennas that have been designed with better performance. in the steady state, the radiation pattern of a plasma antenna will be similar to the case of metallic antennas with the same form, size and performance at the same frequency and power. by sweeping the parameters in the plasma tube, we can change the operatin...

This paper presents a reconfigurable two-port circular patch antenna that improves the performance of a MIMO wireless communications system through pattern diversity. Different modes of the circular patch antenna can be excited by varying its radius with PIN diode switches. Based on this antenna architecture a practical algorithm that exploits the wireless channel spatial selectivity to select ...

This paper presents a microstrip antenna using CPW-fed heptagonal shaped antenna embedded with triangular shaped slots for WLAN/WIMAX applications. The proposed antenna provides an impedance bandwidth of 3.08 GHz. The antenna exhibits dual frequency bands 3.4 GHz to 6.48 GHz, covering WLAN and WiMAX bands. The parametric study is performed to understand the characteristics of the proposed anten...

This paper focuses on the measurement of antenna radiation patterns when fully anechoic conditions are not available and, as consequence, some undesirable echoes are initially present in the measure. Two techniques are analyzed and compared, which -starting from data measured in the frequency domain -allow the echo contributions to be identified and the antenna radiation pattern to be retrieved...

Abstract—Radiation characteristics of a probe-excited rectangular ring antenna are investigated by using the dyadic Green’s function approach. The radiation characteristics, such as radiation pattern, beam-peak direction, half-power beamwidth and directivity, are analyzed. For the specified operating frequency, the ring width and ring height are selected as the same cross-sectional dimension of...

We present a new reconfigurable broadband miniature antenna architecture that is able to change its working frequency, polarization, or radiation pattern to get single broadband or dualband behavior for a single widebeam or multibeam diversity configuration. First the basic so-called “dime” geometry is introduced. Numerical and experimental results for a prototype at 5.2 GHz are presented. Base...

A novel design of Dual band triangular serrated micro strip patch antenna was designed with different models of serrations and their simulation results are presented in this paper. Equal spaced serrated triangular shapes are etched on four sides of the patch and its performance characteristics are simulated. The number of elements on each side of the antenna is taken as 5,6,7,8 and all the mode...

A design of dual-band balanced antenna structure operating in the 700 and 2600 MHz LTE bands is studied and investigated. The overall dimensions of the radiator are 50 × 18 × 7 mm allowing it to be easily concealed within mobile handsets. A broad-band balun is designed and integrated with the antenna handset in order to provide the feeding network and perform the measurements of the antenna rad...

This paper proposes a patch antenna array as an alternative feed for dish antennas on board satellites to solve the weight problem constituted by conventional feed horns. An 8x1 linear, C-Band, circular patch antenna array configuration with a broadside radiation pattern is designed as feed for a dish antenna with F/D ratio of 0.36 corresponding to aperture illumination of 140. The result of an...

An L-strip proximity coupled circular micro strip antenna is proposed. The structure is investigated using circuit theoretic approach and simulated using IE3D simulation software. The patch is designed on at hick substrate of thickness 11mm for a center frequency of 8.9GHz and provides ultra wide band operation. The parametric study is carried out for horizon tall length of L-strip deviation of...