Fabrication of portable HSDPA USB dongle

Author

Kao, Yao Huang ; Yang, Hui Chun

Author_Institution

Dept. of Commun. Eng., Chung Hua Univ., Hsinchu, Taiwan

fYear

2009

fDate

7-10 Dec. 2009

Firstpage

2436

Lastpage

2439

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APMC.2009.5385479

Filename

5385479