Search results for: M. Abou Al‐Alaa
article
Microwave and Optical Technology Letters > 57 > 12 > 2876 - 2883
A quad reconfigurable antenna using 2 × 1 array of rectangular patches is investigated in this article starting from conventional microstrip antenna array with two elements. It offers reconfigurability for frequency, pattern, gain, and polarization in the same design. Modifications are added for conventional 2 × 1 antenna array to get multifunction reconfigurable antenna to change in frequency, pattern,...
chapter
This paper studies the effects of PIFA antenna on human head as well as effects of human head on antenna performance. The maximum values of SAR at different positions in addition to different orientations of antenna with respect to the head model are calculated. SAR values are acceptable under the standard limits. (IEEE C95.1: 1999 with threshold 1.6 W/kg in a SAR 1 gm and IEEE C95.1: 2005 has been...
article
Microwave and Optical Technology Letters > 57 > 7 > 1557 - 1565
Compact multiband dual reconfigurable monopole antenna is presented. To achieve frequency and polarization reconfigurability, PIN diodes as well as MEMS switches are used. For frequency reconfigurability, one switch was inserted on the patch side. When this switch is OFF; the antenna operates at four bands 2.45 GHz, 3 GHz, 3.69 GHz, and 5.5 GHz with corresponding impedance bandwidth of 9.95%, 5.96%,...
chapter
A square patch antenna with both frequency and polarization reconfigurability is presented. The antenna consists of a square patch with coplanar feed on the ground plane. On the patch side, there is a parasitic square ring that responsible for changing the antenna polarization. On the ground plane, there is a rectangular slot by changing of length of this slot the antenna resonance frequency can be...
chapter
A design of frequency reconfigurable PIFA antenna is presented in this paper. The antenna consists of halves of three concentric rectangular patches. Five RF PIN diodes are inserted in proper locations for frequency reconfigurability. Four switching cases are considered. The first case (all switches are ON) results in a single-band operation at 850 MHz with impedance bandwidth of 12.9%. The second...
article
Journal of Electrical Systems and Information Technology > 2014 > 1 > 1 > 17-25
A compact reconfigurable multi-band monopole antenna is presented. To achieve frequency reconfigurability, a PIN diode is used. There are two states of switch. State 1: when the switch is OFF, the antenna operates at four bands: 2.45, 3, 3.69, and 5.5GHz with impedance bandwidth of 9.95, 5.96, 12.57, and 10.76%, respectively. State 2: when a switch is ON, the antenna operates at 2.64, 3.67, 4.94,...
chapter
A design of frequency reconfigurable printed monopole antenna is presented in this paper. The antenna consists of disc patch fed using a microstrip line. Two RF PIN diodes are inserted in proper locations for frequency reconfigurability. Three switching cases are considered. The first case (all switches OFF) results in a single-band operation at 3.52 – 5.28 GHz with impedance bandwidth of 40%. The...
chapter
This paper aims to design pattern reconfigurable microstrip disc antenna with pre-defined rotatable beam according to the required application. In this study, we started from conventional disc microstrip antenna, then subtracting slit ring from antenna radiation surface hence controlling its resonance frequency value by controlling the width and position of the slit. The third step is to divide the...
