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.

A compact tri-band antenna for GPS and GSM applications

Abstract: A compact tri-band antenna is presented in this paper for GSM 900/1800 and GPS applications. The proposed antenna is constructed by two stacked structures, one is a microstrip square ring patch with truncate corners for GPS L1 band, the other is two nested small loops with a multistage matching network composed of lumped components and shorting pins for GSM 900 and 1800 bands, respectively. The dimension of the antenna is 60 × 60 × 12 mm3. Simulation results indicate that the antenna radiates omnidirectional pattern with vertical polarization at GSM 900/1800 bands, and broadside pattern with right-hand circular polarization at GPS L1 band. Finally, a prototype of the antenna is fabricated and measured, whose measurement results meet well with the simulation results.

Tetra (Terrestrial Trunked Radio) and GSM (Global System for Mobile Communications) dual-mode handset

Abstract: The invention relates to a Tetra (Terrestrial Trunked Radio) and GSM (Global System for Mobile Communications) dual-mode handset comprising a main control chip respectively connected with a human-computer interaction interface, a Tetra functional block and audio equipment and a GSM functional block connected with the main control chip, wherein the main control chip inputs a program controlling the switching of a Tetra mode and a GSM mode, and the audio equipment adopts a dual-mode selection switching switch. The invention can carry out communication by utilizing a Tetra protocol to quick call and establish trunking communication with the advantages of low background noise, and the like in Tetra network coverage areas but also can carry out communication by utilizing a GSM network with wider coverage ranges in areas not covered by Tetra network.

Miniaturised Multiband PIFA Antenna using a Frequency Selective Surface (FSS) Ground Plane

Abstract: Given the constrained geometry of modern mobile equipment, the design of small volume antennas such as planar inverted-F Antennas (PIFAs) is of great interest. In devices such as laptops, PDAs, and phones, antennas must be low profile and compact by Huynh, M.-C and Stutzman (2004). Here a novel low cost, easily fabricated, miniaturized multiband PIFA antenna with a frequency selective surface (FSS) as a bottom layer is presented. The miniature PIFA is designed for GSM 900, GSM1800, DECT, DCS, UMTS, Bluetooth (WLAN) and HiperLAN 1&2.

Dual band printed antenna for M2M applications in ISM and GSM bands

Abstract: A dual band antenna for machine-to-machine applications in ISM and GSM bands is presented. The antenna is compact and operates at 409–442 MHz and 800–1224 MHz, with good efficiency and gain across the frequency bands. A parametric investigation of key geometrical parameters is reported.

Design of a CMOS Radio Frequency to Direct Current Power Converter

Abstract: Technologies known as "energy harvesting" offer an approach for powering low-power electronic devices in the sensor networks. This work presents design and analysis of an integrated circuit of a radio frequency to direct current power converter in GSM frequency range using 500 nm SOI CMOS technology. The converter’s layout occupies an area of 0.012 mm2. The proposed power conversion circuit is able to drive a 100 kOhm load resistor when periodically discharging a storage capacitor.