GSM frequency bands

About: GSM frequency bands is a research topic. Over the lifetime, 559 publications have been published within this topic receiving 5067 citations.

Extended Loop Antenna for the Mobile Handset

Abstract: An extended loop antenna, to be continued BLA(Branch Loop Antenna) in the previous volume, for the mobile handset is designed in this paper. It's introduced an ELA(Extended Loop Antenna) that is added extended loops to rectangular loop, and verified antenna performances for applying to mobile handset. Extended loops are located upside, left and right side of rectangular loop, and low resonance is obtained by the length of line. Multiple resonances are established by the extended loops, and obtained the desired service bands by the connection points and lengths. By the implementation and measurement for the multiband ELA, it's showed -3.0～-1.46dBi average gains with 50.15～71.41% efficiencies at CDMA/GSM frequency band, and –8.28～-1.7dBi average gains with 14.87～67.68% efficiencies at DCS/USPCS/ WCDMA frequency band.Key words : Extended loop, ELA, Mobile handset, Internal antenna† 본 연구는 순천향대학교 학술연구비의 일부 지원으로 수행하였음 * 주저자 : 순천향대학교 정보통신공학과 교수 ** 교신저자 : 배재대학교 정보통신공학과 교수† 논문접수일 : 2013년 1월 31일† 논문심사일 : 2013년 3월 5일† 게재확정일 : 2013년 3월 12일

Design and simulation of a metamaterial based dual band antenna using Rectangular Complementary Split Ring Resonator in the ground plane for mobile and wireless applications

Abstract: This paper highlights the proposed design for a dual band Frequency Reconfigurable Monopole antenna fed through a 50Ω line feed over the Rogers substrate for GSM 900 and Wi- Max applications. The novelty of the proposed work lies in using two perpendicular strips loaded with Rectangular Complementary Split Ring Resonator in the Ground plane. The Monopole antenna is proposed to tune between two frequencies of 0.9GHz and 3.5GHz.The structure has been proposed on a Rogers's substrate of permittivity 2.2 with a thickness of 1.6mm.The radiating structure resulted in a Gain of 6.7dBi,8.429dBi,a Bandwidth of 80.5MHz, 144MHz for the lower and the upper frequency bands respectively. The structure resulted in a omnidirectional radiation pattern in the Wi-Max band.

Highly linear TX IF-chip for multicarrier GSM 900 and 1800 base station

Abstract: This paper describes an IF upconverter block, comprising buffers, a mixer, a synthesizer and a VCO, integrated into a single IC for a multicarrier GSM 900/1800 base station transmitter. Multicarrier nature in transmitter means very challenging linearity requirements, in particular when maximum integration is targeted. Therefore this chip reached a very high value of -72.5 dBc IMD3@Pout=-28 dBm/tone. An 0.8 /spl mu/m CMOS process with 5 V supply was used.

Experimental study on gate areas using L-band channel with WiMax frequency for efficient aircraft communication

Abstract: In today's prospective the broadband wireless technologies have become dominant in myriad fields of application. With 3G cellular networks evolution the IEEE 802.16 WiMax (Wireless Interoperability Microwave Access) standard made staggering growth in terms of speed and data transmission when compared to the GSM frequency[1]. This work emphasis on WiMax frequency in aviation domain, focused on measurement of path loss from transmitter within different zones of the airport [2]. The paramount issues during the measuring time considered are Non-Line of Sight (NLOS) and Line of Sight (LOS) conditions between aircraft and ATC(Air Traffic Control Tower)[2]. The IEEE 802.16 standard uses frequency band for WiMax is 1 GHz to 2GHz and different antenna heights are considered from the base station to the mobile station. The path loss is the difference (in dB) between the transmitted power and the received power [2]. A large number of base stations may be necessary to cover all gates with LOS conditions [8] which can be overcome using a good channel characteristic, which can be achieved using L-band satellite frequency band. Based on these measurements we have simulated using Mat Lab simulator which supports MIMO channels.

A Triband Planar Inverted-F Antenna with Quadratic Koch Fractal Shaped Slit Along with a Shorted Parasitic Strip

Abstract: In this paper, a novel compact tri-band planar inverted-F antenna (PIFA) for mobile communication application is proposed. The antenna is capable to cover GSM 900 MHz, DCS 1.8 GHz and WLAN (IEEE 802.11b) 2.45 GHz bands. The proposed PIFA is composed of a quadratic Koch shape slit and a parasitic strip. The PIFA with the fractal shaped slit contributes to the first and second resonance while the shorted strip brings forth the third band. The impedance bandwidths of 84 MHz, 132 MHz and 81 MHz for GSM 900, DCS 1800 and WLAN (IEEE 802.11b) 2450, respectively are achieved. A realized gain of 2.44 dBi, 4.48 dBi and 3.86 dBi is obtained at 0.9 GHz, 1.8 GHz and 2.45 GHz, respectively. The proposed antenna is fabricated and |S11| dB is measured. Reasonable agreement between simulated results as well as measured results is obtained.