A Dual-Polarized Wide-Band Patch Antenna for Indoor Mobile Communication Applications

Abstract

Abstract-This paper proposes the configuration of a dualpolarized wide-band patch antenna system suitable for indoor mobile communication applications. This configuration consists of two patch antennas, which have different feed structures from classical patch antenna configuration. These antennas, which are separated by a thin absorber to have a good isolation, are fed independently to obtain dual polarization. The antenna structure is designed, simulated, manufactured and measured. The operation bandwidth spans 1900-2700 MHz covering Bluetooth, Wireless Local Area Networks (WLAN) and Universal Mobile Telecommunications System (UMTS) bands. The simulations show good agreement with the measurement results that the antennas have return losses higher than 15 dB, and the coupling between two antennas is below −20 dB within the operation band.

Multiband and Wideband Antennas for Mobile Communication Systems

“…This ratio is generally desired to be about 30 dB in outdoor base station applications in order to minimize the interference between back-to-back oriented antennas. On the other hand, the required F/B ratio for indoor applications can be low (Secmen & Hizal, 2010). In mobile phone antennas, the backlobe radiation is usually directly oriented to the head of a human body; therefore, this radiation level is desired to be as low as possible corresponding to high F/B ratio.…”

“…For example, in outdoor base station applications, the standard gain requirement is generally between 10 and 20 dBi (dBi: gain in dB scale relative to isotropic antenna) within frequency bandwidth, which is usually achieved with array structures (Arai, 2002). For indoor mobile communication, moderate gain (5-7 dBi) is usually sufficient (Serra et al, 2007;Secmen & Hizal, 2010). However, the gain of the antenna may decrease even to 1 dBi within the designated frequency band for handset applications (Rahmat-Samii et al, 2008).…”

“…between 1900 and 2700 MHz (Secmen & Hizal, 2010;Caso et al, 2010). At this point, the readers may wonder what "the antenna operates at this frequency properly" means.…”

Broadband Single-Fed Single-Patch Circularly Polarized Microstrip Antenna

“…In the past decades, microstrip patch antenna technique has been developed rapidly [1][2][3][4][5][6]. However, the design of a broadband circularly polarized patch antenna that uses a single feed has long been a challenging problem, as compared to the design of linearly polarized (LP) and the dual-fed circularly polarized (CP) patch antennas [7,8].…”

Evaluation of Dcs1800/Cdma-Evdo Dual-Mode and Dual-Link Ue System Performance Based on the High Isolation Handset Antenna

“…For example, many researches are placed on UE antenna designs and realizations which lead to multiband antennas [2][3][4][5][6][7][8][9][10][11], miniaturized antennas with low return loss [12][13][14][15][16] are successful developed, yet these antennas are all designed without considering the isolation between them. Papers [17][18][19][20] analyze the dual-mode interference between UWB and cellular systems, and the multi-mode co-existence between cellular systems is also included in [21][22][23][24][25], but problems exist that the interference scenarios they researched are all single-mode single-link for each UE.…”