On‐board small‐size printed monopole antenna integrated with USB connector for penta‐band WWAN mobile phone

Abstract

An on-board small-size printed two-strip monopole antenna integrated with a universal series bus (USB) connector and generating two wide operating bands to cover penta-band wireless wide area network operation in the 824-960/1710-2170 MHz bands is presented. The two strips of the antenna are respectively printed on two small no-ground portions of 15 Â 25 and 15 Â 15 mm 2 (total size 600 mm 2 ). In-between the two printed strips, there is a protruded ground of 15 Â 10 mm 2 to accommodate a USB connector, which serves as the data port of the mobile phone. Also, easy control of the antenna's two wide lower and upper bands can be achieved by respectively adjusting the longer and shorter strips of the printed monopole antenna. That is, the antenna is easy to fabricate and also easy to fine-tune in practical applications. Details of the proposed antenna are presented and discussed. The radiation characteristics of the antenna, including the specific absorption rate results with the presence of the user's head and hand, are also studied.

On‐board small‐size printed LTE/WWAN mobile handset antenna closely integrated with system ground plane

“…The on‐board printed internal antenna with a two‐dimensional structure is easy to fabricate and very suitable for slim mobile handset applications, owing to its very low profile compared with the traditional three‐dimensional bulk internal antennas [1–5]. There have been some promising on‐board printed antennas reported for the five‐band wireless wide area network (WWAN) operation in the 824–960 and 1710–2690 MHz bands [6–13]. For covering eight‐band long term evolution (LTE) [14]/WWAN operation in the 698–960 MHz band (LTE700/GSM850/900) and 1710–2690 MHz band (GSM1800/1900/UMTS/LTE2300/2500), relatively few designs have been demonstrated [15–18], owing to the design challenge to obtain a much wider operating band with a small board space occupied for the antenna.…”

Surface‐mount WWAN monopole slot antenna for mobile handset

“…1(b)], which is printed on the back surface of the main circuit board. The distance (t) between the rectangular notch and the bottom edge of the main circuit board is 15 mm, and the ground portion in this region can be used to accommodate associated electronic elements such as a universal series bus connector [25] to serve as a data port for external devices [26], the lens of an embedded digital camera [27,28], and so forth. Also note that an FR4 substrate of relative permittivity 4.4, loss tangent 0.02, thickness 0.8 mm, length (L) 115 mm, and width (W) 60 mm is used as the main circuit board in the study.…”

Internal eight‐band WWAN/LTE handset antenna using loop shorting strip and chip‐capacitor‐loaded feeding strip for bandwidth enhancement

“…No isolation space is generally required between the antenna and the surrounding ground plane, which makes the antenna occupy a small no‐ground board space of 15 × 35 mm 2 on the main circuit board. With the proposed design, the extended ground plane can be used to accommodate nearby electronic elements such as the loudspeaker [22, 23], lens of the embedded digital camera [15, 24], universal serial bus (USB) connecter [25, 26] as the data port, and so on. This can lead to more degrees of freedom in arranging the internal antenna inside the handset and more compact integration of the internal antenna with the associated electronic elements inside the handset.…”