Reduce the Hand-Effect Body Loss for Lte Mobile Antenna in Ctia Talking and Data Modes

Abstract

Abstract-The reduction in the radiation efficiency of an antenna in a mobile handset due to user's hand effects in the talking and data modes is studied. A parameter called "body loss" is defined to evaluate the degradation of the radiation efficiency. A C-fed on-ground (OG) PIFA antenna, which can cover two typical LTE bands of 0.75 GHz-0.96 GHz and 1.7 GHz-2.1 GHz, is used to study the property of the hand-effect body loss in two CITA test positions: the talking and data modes. Three different positions of the proposed antenna in the talking mode are compared, and the position with the antenna located on the bottom of the mobile handset and facing the head is recommended for minimal body loss. A modified design with a smaller antenna width is proposed to reduce further the hand-effect body loss in the talking and data modes.

A Novel Design of Lte Smart Mobile Antenna With Multiband Operation

“…a lower band (including LTE700, LTE800, and GSM), and a upper band (including DCS, PHS, PCS, UMTS, Bluetooth, and WLAN). It should be reemphasized that the present design allows an easier implementation of an octo-band operation antenna than those using an additional patch [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17].…”

“…Recently, the band of Long Term Evolution (LTE) has attracted much attention, because it is promising in the 4G communication due to larger amount and higher speed of transmission. Therefore, there has been much research focusing on the application of LTE operation on smart phones, laptop computers, and tablet computers [4][5][6][7][8][9][10][11][12][13][14][15][16][17]. However, it is difficult to design an antenna for the LTE700 band using conventional dipole or monopole antennas, since the low frequency operation leads to a longer current path.…”

A Wideband Directional Microstrip Slot Antenna for On-Body Applications

“…Furthermore, the antenna far field radiation should be considered for the communication among the on-body sensors and among these sensors and among these sensors and some nearby equipment (such as a mobile phone or a laptop personal computer). Consequently, the wideband antennas should be designed according to the specified characteristics [2,5,6].…”

Multiband Handset Antenna Analysis Including Lte Band Mimo Service

“…It is well-known that achieving high isolation and low Enveloped Correlation Coefficient (ECC) between closely spaced antennas is important in portable MIMO-embedded devices where antennas must be designed within a small volume [4]. However, modern handset antennas should still be miniaturized with good performance, and isolation improvement is also important to realize the MIMO antennas for the LTE 700 bands in the limited space of recent mobile handsets [5][6][7]. Since most MIMO antenna elements of recent mobile handsets are collocated on the same printed circuit board (PCB), the surface current distribution on the PCB induces mutual coupling between antenna elements and common ground plane.…”