Small‐size printed monopole with a printed distributed inductor for pentaband WWAN mobile phone application

Abstract

In this article, a small-size printed monopole embedded with a printed narrow strip as a distributed inductor for application in the mobile phone to achieve GSM850/900/1800/1900/UMTS pentaband wireless wide area network operation is presented. With the printed distributed inductor, the fundamental (lowest) resonant mode of the proposed antenna can be effectively shifted to lower frequencies with a wide operating bandwidth, owing to the contributed inductance of the printed distributed inductor compensating for the increased capacitance resulting from the decreased resonant length of the monopole. In this study, the proposed antenna can be printed on the small no-ground portion of size 14 Â 40 mm 2 on the main circuit board of the mobile phone, making it easy to fabricate at low cost and generally showing no thickness above the circuit board; the latter is very attractive for thinprofile mobile phone applications. The proposed monopole antenna is studied in detail in this article. The results also show that the antenna is very suitable to be placed at the bottom of the mobile phone; in this case, the antenna meets the specific absorption rate limit for practical applications.

A Novel Ancient Coin-Like Fractal Multiband Antenna for Wireless Applications

“…Many technologies have been studied to realize multiband capabilities, including coupling feed technologies [3][4][5], slot loaded technologies [6,7], loading the matching network [8], loading printed distributed inductance technologies [9], and fractal technologies [10]. Three design approaches have been adopted to control the current path and resonant mode on the radiators.…”

A Compact Triangular Slot Array Multiband Antenna for Wireless Applications

“…Meanwhile, CPW-fed is the most popular feeding structures adopted in recent literatures [4][5][6]. In order to better achieve the multiband and miniaturization, many technologies have been studied, such as coupling feed technology [7][8][9], slot loaded technology [10][11], loading the matching network [12], and loading printed distributed inductance technology [13] and fractal technology [14]. Inverted L-slot patch with a defected ground plane is used for triple-band operation in [15], whereas three circular-arc-shaped strips whose whole geometry looks like "ear"-type antenna are reported to cover the desirable bands for WLAN/WiMAX wireless communication terminal in [16].…”

Design of a Dual-polarization Dual-band MIMO Antenna for Wireless Applications

“…In order to better achieve the multiband and miniaturization, many technologies have been studied, such as coupling feed technology [1][2][3], slot loaded technology [4][5], loading the matching network [6], and loading printed distributed inductance technology [7] and fractal technology [8]. Inverted L-slot patch with a defected ground plane is used for triple-band operation in [9], whereas three circular-arc-shaped strips whose whole geometry looks like "ear"-type antenna are reported to cover the desirable bands for WLAN/WiMAX wireless communication terminal in [10].…”