Title :
Fabrication of portable HSDPA USB dongle
Author :
Kao, Yao Huang ; Yang, Hui Chun
Author_Institution :
Dept. of Commun. Eng., Chung Hua Univ., Hsinchu, Taiwan
Abstract :
The construction of portable HSDPA USB dongle is studied. Of course, data service such as GPRS and EDGE are also supported. In the multi-mode operation of GPRS & EDGE exit GSM850, EGSM, GSM1800 and GSM1900. For WCDMA & HSDPA, Band I, II, and V are treated in our dongle. So, the dongle must fulfill the requirements for multi-mode and multi-band services. The power regulator with LDO is indicated to have the heat problem and leads to adjacent channel leakage ratio (ACLR) fail even drop the call. Change LDO to Bulk can overcome the temperature rising, but produce switching noise, which will cause the in-band noise and sensitivity degradation. The solutions to the wireless in-band noise are proposed. Also the transient peak current for GSM transmitter is solved.
Keywords :
3G mobile communication; cellular radio; code division multiple access; packet radio networks; portable instruments; radio transmitters; telecommunication standards; EDGE; EGSM; GPRS; GSM transmitter; GSM1800; GSM1900; GSM850; LDO; WCDMA; adjacent channel leakage ratio; data service; heat problem; multiband services; multimode operation; portable HSDPA USB dongle; power regulator; sensitivity degradation; switching noise; transient peak current; wireless in-band noise; Degradation; Fabrication; GSM; Ground penetrating radar; Multiaccess communication; Regulators; Temperature sensors; Transmitters; Universal Serial Bus; Wireless sensor networks; ACLR; Bulk; HSDPA; LDO; multi-mode;
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5385479
