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The New C-class GaN Hybrid Amplifier

January 17, 2011
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The new C-class GaN (Gallium Nitride) hybrid amplifier using GaN-on-SiC (Gallium Nitride on Silicon carbide substrate) devices was recently released from RFHIC. The amplifier gives VHF 8 W in 130 to 450 MHz range with an efficiency of 60% and UHF 6 W in 450 to 960 MHz range with an efficiency of 50%. Input and output matching circuits are included in the design with bias circuits and other matching circuits. Physical size of the amplifier is 15mm x 10mm x 5.4mm and is a SMD (surface mount device) type hybrid GaN amplifier. Input voltage is 24V to 34V and uses ceramic substrate over copper heat slug.

Existing TETRA (Terrestrial Trunked Radio, formerly known as Trans European Trunked Radio) amplifiers use LDMOS (Laterally Diffused Metal Oxide Semiconductor) technology and operates on 5V to 12V supply voltage. Also previous designs separated three to four bands of 130 to 220 MHz, 380 to 400 MHz, 410 to 470 MHz, 560 to 580 MHz, and 870 to 933 MHz and combining loss were inevitable. Recent developments in the TETRA technology will require the use of full 100 to 960 MHz frequency range coverage and the ne W RFHIC GaN hybrid amplifier fits exactly on that application. Better efficiency amplifiers can reduce the number of the base station installations in the field for a greener environment.

New GaN technology enables the new efficient solution to the most of the TETRA replacement amplifiers and new installations. RFHIC has developed this wideband TETRA GaN hybrid amplifier for customers who are looking for greener solutions for their system designs. One TETRA system can no W cover the full 100 to 960 MHz band with efficiency of 50 to 70%. Production yield is guaranteed with a SMD type package and all amplifiers are 100% tested and aged for immediate installation.

RFHIC started using Gallium Nitride (GaN) technology since 2004. With extensive research and design experience, RFHIC accumulated technological breakthroughs in major areas such as internal matching, heat dissipation, Doherty designs, module optimization, MMIC design and package assembly. These experiences contributed on designing a better performance GaN power amplifier with lower cost for the telecommunication market. RFHIC is now working on 100 W and 500 W TETRA hybrid amplifiers. 20 W and 40 W amplifiers are already in production. For more information please visit the company’s website by clicking the link below our logo on this page.

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