Enhanced Low Profile, Dual-Band Antenna via Novel Electromagnetic Band Gap Structure

Abstract

Abstract-This paper presents a dual-band, low profile antenna with reduced specific absorption rate (SAR) for mobile handset applications. Here, dual-band operation is obtained by combining a printed dipole antenna (initially resonating at 4.3 GHz) with EBG mushroom-like structures loaded with circular slots (CS). The final structure operates at 3.44 GHz (additional band required for LTE Advanced LTE-A) and 4.5 GHz (for Smartphone WLAN applications) with improved bandwidth and reflection coefficient (350-MHz around 3.5 GHz with −26 dB, and 330 MHz around 4.5 GHz with −30 dB). Finally, a dosimetry study of the proposed printed dual-band dipole antenna is presented and verifies an SAR reduction from 9 W/Kg to 1.41 W/Kg compared to the same antenna without any loading structure, and from 3.98 W/Kg to 1.41 W/Kg compared to a standard EBG mushroom-like structure.

Improved Performance of Double-T Monopole Antenna for 2.4/5.6 GHZ Dual-Band Wlan Operation Using Artificial Magnetic Conductors

“…The metal plate is placed on a 20 × 20 mm 2 dielectric substrate with the same material of double-T monopole antenna and 1.62 mm thickness. The first resonance frequency of the unit cell is more affected by the overall dimensions of the unit cell and also the size of the metal square plate while the second one is more affected by the size of the square slot in the center of the plate [13]. There is a 3.5-mm air gap between the ground plane of the unit cell and the dielectric substrate which is determined in Fig.…”

“…A wider AMC in-phase frequency band with better performance and also a reduced AMC substrate height are obtained by the existence of this air gap. Reducing AMC substrate thickness and accordingly decreasing weight and cost are more evident at low frequencies [3][4][5][6][7][8][9][10][11][12][13][14]. The unit cell simulation is performed in frequency domain, and the reflection phase diagram versus frequency is depicted in Fig.…”

A Compact Triple Band EBG Using Interdigital Coplanar Waveguide Structure for Antenna Gain Enhancement

“…From the drawbacks of all research studies mentioned above, this research proposes a design of the new compact EBG unit cell, capable of controlling three frequency bands, modified from the M-EBG unit cell. e coplanar waveguide structure and interdigital technique have been employed to create the EBG for size reduction due to slow wave structure [27,28] and low profile with high gain antenna [29,30].…”