Abstract
A novel internal printed antenna suitable for triple long-term evolution (LTE) bands for handheld devices is presented. The operating bandwidths of the design are LTE700 (698~800 MHz), LTE2300 (2300~2400 MHz), and LTE2500 (2500~2690 MHz). Through the use of a C-shape broadside coupled feed structure, full operation in the lower band is achieved. The antenna itself uses two unequal path lengths to produce a low frequency band with two resonant modes. The required bandwidth is then adjusted using a couple feed, and finally placed over a ground plane via another C-type coupling element in order to enhance the two low-frequency matches. In the definition of the −6 dB reflection coefficient, the bandwidth of two basic modes in the low frequency band is 0.689~0.8 GHz. We adopt the definition of the −10 dB reflection coefficient for the high frequency mode, and its working frequency bands are shown to be 2.3~2.72 GHz. The antenna size is only 40 × 12 × 0.8 mm3with a ground plane of 98 × 40 mm2.
Highlights
In recent years, mobile communication requires a handheld mobile device to function on multiple communication systems which has made the multiband mobile antenna increasingly important [1–3]
In [4], a planar structure was used to design an antenna functioning in the LTE700/LTE2300/LTE2500 bands
This paper presents a miniaturized printed antenna design for a mobile communication device, which operates at frequency bands meeting the required operating bandwidths
Summary
Mobile communication requires a handheld mobile device to function on multiple communication systems which has made the multiband mobile antenna increasingly important [1–3]. In [5], a relatively smaller planar structure was used to design a multiband antenna, which covered the frequency bands of LTE700/LTE2300/LTE2500. In this case the low frequency section failed to cover the entire band; it narrowed the relative bandwidth of the planar structure covering the same area as the 3D structure. This is because a 3D structure can often use its side to widen the wire and decrease the Q value in order to increase its operational bandwidth. This paper presents a miniaturized printed antenna design for a mobile communication device, which operates at frequency bands meeting the required operating bandwidths. Through the use of a coupling feed and imbedding a C-shape coupler underneath, the proposed antenna achieves excellent impedance matching within the operating bands
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
