Article

Miniature Ceramic Dual-PIFA Antenna to Support Band Group 1 UWB Functionality in Mobile Handset

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Abstract

A ceramic antenna which provides UWB functionality over band group 1 is proposed for integration into a mobile handset. Two separate PIFA antennas are incorporated into a single feed structure enabling separate resonances to be independently controlled and combined to achieve wide bandwidth. This surface mounted ceramic block antenna which maintains a volume of 315 mm<sup>3</sup> is suitable for automated production. A prototype was tested and agreement with numerical work was observed for the S<sub>11</sub>, radiation pattern and efficiency.

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... However, because the PIFA features a narrow bandwidth, it is not suitable for UWB applications [13]. In order to satisfy the required performance over the UWB frequency range, the PIFAs with bandwidth enhancement technologies have been studied [13][14][15][16]. Typical bandwidth-enhanced PIFAs include an inverted-L-shaped parasitic element and a rectangular parasitic element [13], double posts [14], a dual-PIFA [15], and a parasitic planar inverted-L element [16]. ...
... In order to satisfy the required performance over the UWB frequency range, the PIFAs with bandwidth enhancement technologies have been studied [13][14][15][16]. Typical bandwidth-enhanced PIFAs include an inverted-L-shaped parasitic element and a rectangular parasitic element [13], double posts [14], a dual-PIFA [15], and a parasitic planar inverted-L element [16]. However, these antennas are not suitable for UWB applications due to their large height and size. ...
... Volume, thickness, and bandwidth comparisons between previous UWB PIFAs and the proposed antenna are given in Table 1. Previous UWB PIFAs also are either not satisfying the full UWB frequency range despite their larger volume [13][14][15] or satisfying the full UWB frequency range with larger volume [16]. As shown in Table 1, the proposed antenna has the smallest volume and thickness. ...
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