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

Abstract

In this article, a compact dual‐band antenna based on composite right/left‐handed transmission line (CRLH‐TL) is proposed for WWAN/LTE wireless terminal applications. By using 2 symmetrical CRLH structures, the proposed antenna can easily produce 2 wide separate operating frequency bands with a compact size of 25 × 25 × 6 mm3. Additionally, a pair of matching strips is introduced on both sides of the feeding line to further improve the impedance characteristics of the terminal antenna. The experimental results demonstrate the proposed antenna is capable of working over the frequency ranges of 0.66‐1.06 GHz and 1.68‐2.88 GHz with |S11| < −6 dB, which can cover the bands of LTE700, GSM850, GSM900, GSM1800, GSM1900, UMTS, LTE2300, and LTE2500 for wireless terminals. Moreover, the multiple input multiple output (MIMO) operating performance of the proposed antenna element is also studied, and an enhanced isolation between the antenna elements is obtained by utilizing the defected ground structures and grounded branches.

A stable gain periodic microstrip leaky‐wave antenna with the open‐stopband eliminated

“…13,14 One common method is to design a microstrip LWA based on a composite right/left-handed structure. 15 The microstrip line itself can provide natural equivalent series inductance L R and equivalent shunt capacitance C R . The CRLH structure can be formed by introducing equivalent series capacitance C L and equivalent shunt inductance L L in the microstrip line.…”

“…Different technologies have been proposed to suppress the generation of the OSB 13,14 . One common method is to design a microstrip LWA based on a composite right/left‐handed structure 15 . The microstrip line itself can provide natural equivalent series inductance L R and equivalent shunt capacitance C R .…”

Reconfigurable a Dual-Port Multi-Band Antenna System with High Isolation Tuning Characteristics for Portable Wireless Devices

“…Three PIN diodes are used as a switching device in the planer antenna [13] to provide reconfigurability for sub-6 GHz 5G bands (2.1, 2.4, 3.6, and 5.2 GHz) with an expanded use for Wireless Local Area Network (WLAN). The stated references [3][4][5][6][7][8][9][10][11][12][13] incorporate additional bands into the same antenna, complicating antenna design [14,15]. As a result, such frequencyreconfigurable MIMO antenna systems are an excellent solution for meeting the high-rate data requirements of modern wireless technologies due to their ability to operate in MIMO mode while reconfiguring their operating frequency in response to system demands.…”

Compact planar frequency reconfigurable multiple‐input‐multiple‐output antenna with pattern and polarization diversity characteristics for WiFi and WiMAX standards

“…3 However, accommodating more bands in the same antenna makes the antenna design challenging task. 4,5 Recently, several MIMO antenna designs have been reported in the literature for dual-band WLAN applications [6][7][8][9][10][11][12][13][14][15][16][17][18][19] and some have been reported for dual-band WiMAX applications. 17,[20][21][22][23][24] In these reported papers, some of the designs have nonplanar structure 15,17,18,24 and are not suitable for compact planar portable devices.…”

“…Modern wireless devices support several standards and operate in more than one band at the same time . However, accommodating more bands in the same antenna makes the antenna design challenging task . Recently, several MIMO antenna designs have been reported in the literature for dual‐band WLAN applications and some have been reported for dual‐band WiMAX applications .…”