scholarly journals Small-Size Eight-Band Frequency Reconfigurable Antenna Loading a MEMS Switch for Mobile Handset Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Xin Meng
Keyword(s):  
Reconfigurable Antenna ◽  
Rf Switch ◽  
Band Frequency ◽  
Mems Switch ◽  
Lower Band ◽  
Resonant Modes ◽  
The One ◽  
Mobile Handset ◽  
Total Dimension ◽  
Frequency Reconfigurable Antenna

A planar small-size eight-band frequency reconfigurable antenna for LTE/WWAN mobile handset applications is proposed. The proposed antenna consists of a feeding strip and a coupled strip, with a total dimension of 10 × 29.5 mm2. Reconfigurability is realized by incorporating a one-pole four-throw RF switch, which is embedded in the coupled strip and changes the resonant modes for the lower band. By combining four different working modes, the proposed antenna successfully realize the eight-band operation, covering the operating bands of 700~787 MHz, 824~960 MHz, and 1710~2690 MHz. In addition, the simple DC bias circuit of the RF switch has little effect on the antenna performances, with no significant reduction in antenna efficiency and variations in the radiation patterns. The measured antenna efficiencies are 40%~50% and over 60% for the lower band and the upper band, respectively. Prototypes of the proposed frequency reconfigurable antenna incorporating the one-pole four-throw switch are fabricated and measured. The measured results including return losses and radiation characteristics are presented.

scholarly journals Compact Antenna with Frequency Reconfigurability for GPS/LTE/WWAN Mobile Handset Applications

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Lingsheng Yang ◽  
Biyu Cheng ◽  
Yongan Zhu ◽  
Yajie Li
Keyword(s):  
Radiation Efficiency ◽  
Impedance Bandwidth ◽  
Reconfigurable Antenna ◽  
Antenna Gain ◽  
Radiation Patterns ◽  
Rf Switch ◽  
Compact Antenna ◽  
Resonant Modes ◽  
Mobile Handset ◽  
Frequency Reconfigurable Antenna

A compact frequency reconfigurable antenna for mobile handset application is proposed in this paper. The antenna consists of an inverted L-shaped feeding strip, a shorter grounded strip, and a longer grounded strip which is connected with four inductors by using a single-pole four-throw RF switch. When we change the working states of the RF switch, the corresponding inductor is connected with the long grounded strip and different resonant modes of the antenna can be realized. The measured −6 dB impedance bandwidth of the presented antenna is 683–960 MHz and 1460–2820 MHz, which is able to cover the LTE700/GSM850/900 and GPS/DCS1800/PCS1900/UMTS2100/LTE2300/2500 bands. The antenna gain, radiation efficiency, and radiation patterns are also described in the paper.

Compact Eight-Band Frequency Reconfigurable Antenna for LTE/WWAN Tablet Computer Applications

2014 ◽  
Vol 62 (1) ◽  
pp. 471-475 ◽  
Author(s):  
Yong-Ling Ban ◽  
Si-Cheng Sun ◽  
Peng-Peng Li ◽  
Joshua Le-Wei Li ◽  
Kai Kang
Keyword(s):  
Computer Applications ◽  
Tablet Computer ◽  
Reconfigurable Antenna ◽  
Band Frequency ◽  
Frequency Reconfigurable Antenna

scholarly journals Compact tri-band T-shaped frequency reconfigurable antenna for cognitive radio applications

2020 ◽  
Vol 9 (1) ◽  
pp. 212-220
Author(s):  
Abdullah Ali Jabber ◽  
Raad H. Thaher
Keyword(s):  
Cognitive Radio ◽  
Frequency Band ◽  
Relative Dielectric Constant ◽  
Reconfigurable Antenna ◽  
Rf Switch ◽  
Resonant Frequencies ◽  
Satellite Radar ◽  
Mobile Satellite ◽  
Tan Δ ◽  
Frequency Reconfigurable Antenna

This paper presents, new compact tri-band and broadband frequency reconfigurable antenna for cognitive radio applications. The proposed antenna consists of an Ultrawideband sensing antenna and reconfigurable communicating antenna at the same substrate. The sensing antenna is a UWB printed elliptical monopole antenna operates at frequency band from 2.72 to 23.8 GHz which can cover the entire UWB frequency band from 3.1 to 10.6 GHz and cover the broadband up to 20 GHz. The communicating antenna is a T-shaped frequency reconfigurable antenna operates on three bands of 7.925 GHz, 13.16 GHz, and 14.48 GHz under (S11≤-10 dB) with a fractional bandwidth of 14.55%, 6.2%, and 3.3% respectively. The proposed antenna used to operate in two modes one for cognitive radio applications to cover WiMAX, land, Fixed and Mobile satellite, Radar, and broadband applications. The frequency reconfigurability is obtained by using only one RF switch (PIN diode) for changing the operating frequency. The antenna overall dimensions are 42x30x1.6 mm3 printed on an FR-4 epoxy substrate with relative dielectric constant εr=4.3, loss tangent tan (δ)=0.002 and 50Ω microstrip line feed. The maximum obtained simulated gain is 8.5 dB at 13.16 GHz. The S11 is under -20 dB and coupling between the two antennas is less than -15 dB at the resonant frequencies.

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