DocumentCode :
2673858
Title :
Rated power increment and VSWR characteristics improvement of termination resistor
Author :
Rahman, Akhlaq ; Olinger, Fred ; Howieson, Michael
Author_Institution :
Thin Film Technol. Corp., North Mankato, MN, USA
fYear :
2011
fDate :
15-17 May 2011
Firstpage :
1
Lastpage :
6
Abstract :
Matching RF and Microwave signals to components within a circuit has become more challenging for circuit designer as operating frequency and power handling requirement increase. Termination resistors with excellent power handling capability with superior voltage standing wave ratio (VSWR) characteristics are needed for microwave circuit components in various wireless and telecommunication application. In this work, we extensively studied to improve the power handling capability and VSWR of termination resistor while maintaining the smaller size. We optimized the energy transmission within the component and significantly improved the efficiency of energy transfer between the transmission lines and the terminations. We discussed techniques of improving power handling capability and reduction of thermal fatigue to the component´s structure. By using innovative techniques of heat transfer we appreciably increased power handling capability while keeping the product size as minimum. We improved the package technology and reduced the chance of solder cracking due to thermal fatigue. We constructed matching network using integrated microstrip line at the beginning of the resistor material. We optimized impedance matching by varying length, width and pattern of transmission line as well as using defective ground structure (DGS) technique. We minimized the detrimental influence of component footprint and resistor material characteristics effect on signal reflection. Considering the necessary microwave parameters and required thermal performance, we designed and manufactured Pb free high power termination resistor. Several sizes of resistor are manufactured with rated power of 20 Watt, and 100 Watt which provides excellent VSWR characteristics for frequency up to 4 GHz. Resistors are manufactured for 50 ohm impedance; however, methods mentioned in the study are applicable to any impedance.
Keywords :
heat transfer; microwave circuits; power electronics; resistors; thermal stress cracking; VSWR characteristics; circuit designer; component footprint material characteristics; heat transfer; impedance matching; integrated microstrip line; microwave circuit components; power 100 W; power 20 W; power handling capability; rated power increment; resistance 50 ohm; termination resistor; thermal fatigue; transmission lines; voltage standing wave ratio characteristics; Heat transfer; Heating; Printed circuits; Radio frequency; Resistors; Surface impedance; Thermal resistance; Heat dissipation; Termination resistor; Thermal resistivity; Voltage standing wave ratio;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Electro/Information Technology (EIT), 2011 IEEE International Conference on
Conference_Location :
Mankato, MN
ISSN :
2154-0357
Print_ISBN :
978-1-61284-465-7
Type :
conf
DOI :
10.1109/EIT.2011.5978598
Filename :
5978598
Link To Document :
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