Dual-feed full-metal-case antenna for WWAN/LTE smartphone applications

Abstract

A dual-feed small size full-metal-case (FMC) antenna for hepta-band LTE/ WWAN operation in smartphone applications is presented. The antenna proposed here is an integrated part of the full metal case located at the top edge of the smartphone, and it only occupies a small volume of 5 mm 3 70 mm 3 6 mm. It has two feeding ports that are separately connected to an ON/OFF switch (SW1 and SW2) for controlling the lower and higher operation bands, respectively. For the case when SW1 (ON) and SW2 (OFF), Port-1 is engaged, and a lower operating band that covers the GSM850/900 operation (824-960 MHz) is achieved. In contrast, Port-2 will be engaged for the case when SW1 (OFF) and SW2 (ON), and with the aid of a wideband matching circuit, the antenna can induce a higher operating band that can cover the DCS/PCS/UMTS2100/LTE2300/LTE2500 operations (1690-2690 MHz). Detailed design considerations of the proposed FMC antenna are described, and both experimental and simulation results are also presented and discussed. V C 2016 Wiley Periodicals, Inc. Int J RF and Microwave CAE 00:000-000, 2016.

A novel uniplanar antenna with dual wideband characteristics for tablet/laptop applications

“…Therefore, it is highly possible that this proposed antenna can be included for the investigation on its effectiveness in combating metal casing. [28][29][30] To further emphasize the advantages of this proposed antenna over other reported ones in Refs. 12-26, their detail electrical and mechanical performances are compared in Table 1.…”

“…Furthermore, due to its reduced ground effects characteristic, changing the size of the system ground will not affect the impedance matching of the five resonant modes. Therefore, it is highly possible that this proposed antenna can be included for the investigation on its effectiveness in combating metal casing …”

Compact dual-band antenna based on CRLH-TL for WWAN/LTE terminal applications

“…Besides, in Refs. , the frequency‐reconfigurable technology is introduced to reduce the occupied space of antennas and still ensure their wide operating band.…”

“…1 To address this problem, various antenna design methods have been reported in recent years. [2][3][4][5][6][7][8][9][10][11][12][13][14] The proposed antennas with coupling feed in Refs. 2-4 can excite several resonant modes to obtain multiband operation.…”

“…Therefore, designing a compact multiband terminal antenna with satisfactory performance is not only a fundamental requirement but also a significant technological challenge . To address this problem, various antenna design methods have been reported in recent years . The proposed antennas with coupling feed in Refs.…”