Planar Small-Size Eight-Band LTE/WWAN Monopole Antenna for Tablet Computers

A design approach of multiband and wideband antennas for radio communication devices is presented. The antenna is consisted of a monopole, a folded loop, and a helix. The fundamental behaviors of the single element and their combinations are analyzed to give desired bandwidths per the mutual coupling between elements. The ground plane dimension and the device thickness are considered. The study has a focus on the UHF and lower microwave range to support most of civilian applications. The presented antenna structure is a good starting point to be familiar with the multiband antenna design as the antenna can be configured to cover a wide frequency range to support cellular telephony, GPS, wireless local networking on so forth. A radio communications device incorporating such antennas is also described.

Section: Bar/phablet/tablet Devicesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

General design approach of monopole and helix integrated antennas for radio apparatus

Ren

Hwang

2015

“…Printed monopole antennas have been broadly found their applications in tablets, laptops, and mobile phones . The multifrequency monopole antennas are providing most promising way of integration with handheld devices for commercial applications.…”

Section: Introductionmentioning

confidence: 99%

“…Printed monopole antennas have been broadly found their applications in tablets, laptops, and mobile phones. [2][3][4][5][6][7] The multifrequency monopole antennas are providing most promising way of integration with handheld devices for commercial applications. The mode excitation in printed monopole antennas can be governed by modifications in physical dimension of associated branches without any significant changes in substrate dimensions.…”

Section: Introductionmentioning

confidence: 99%

Design of wide band printed monopole antenna for low rate wireless personal area networks

Upadhyaya

2018

A dual‐band printed monopole antenna useful in low‐rate wireless personal area networks (LR‐PAN) and GPS operation for tablet devices is presented. Antenna has monopole strips arranged in planar configuration on substrate suitable to match standard tablet computer display size. The overall antenna dimension is 150 × 50 × 1.6 mm3. The long and short strips of monopole are separated by notch to increase the bandwidth of antenna. The operating impedance bandwidths of 14.97% and 5.09% are obtained across LR‐PAN band and GPS band, respectively. The presented monopole antenna provides significant gain in order of 4.48 dBi for lower resonant mode and 3.26 dBi for higher resonant mode. The antenna covers LR‐WPAN frequency bands of 868.3 MHz, 915/920 MHz, GSM 850, UMTS/LTE 850, 1.57 GHz GPS bands.

“…The three open‐slot radiators include the U‐slot itself, a short open slot (Slot 1) between a first slot opening and the microstrip feedline as a virtual shorting, and a long open slot (Slot 2) between a second slot opening and an inverted‐U strip added to connect across the U‐slot. With the aid of a wideband matching circuit, the three open‐slot radiators (U‐slot, Slot 1, and Slot 2) generate their fundamental slot resonant modes to form two wide operating bands to cover the desired 698–960 and 1710–2690 MHz bands for the LTE operation .…”

Section: Introductionmentioning

confidence: 99%

Dual‐wideband U‐shape open‐slot antenna for the lte metal‐framed tablet computer

Tsai

2015

The open‐slot antenna is very suitable for applications in the metal‐framed tablet device, such as the tablet computer, to achieve a low profile with wideband or multiband operation. This article presents a U‐shape open‐slot (U‐slot) antenna with a low profile of 7 mm to the top edge of the metal‐framed tablet computer for the LTE operation. The U‐slot has a simple structure of length 70 mm and the two slot openings thereof are disposed at the metal frame. The U‐slot antenna is fed using an end‐shorted 50‐Ω microstrip feedline, with a wideband matching network embedded therein. The antenna can support a 0.5‐wavelength slot resonant mode supported by the U‐slot itself and a 0.25‐wavelength slot resonant mode created by the open‐slot radiator (denoted as Slot 1 in this study) formed between one slot opening and the microstrip feedline as a virtual shorting. By further using an inverted‐U strip connecting across the U‐slot, the antenna can create an additional open‐slot radiator (denoted as Slot 2 in this study) to generate a 0.25‐wavelength slot resonant mode at lower frequencies. The resonant modes supported by the U‐slot, Slot 1, and Slot 2 can form two wideband operating bands to cover the LTE operation in the 698–960 and 1710–2690 MHz bands. Details of the proposed U‐slot antenna and the effects of the inverted‐U strip connecting across the U‐slot and the matching network are addressed. Experimental results of the fabricated U‐slot antenna are also presented. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2677–2683, 2015