Antenna Systems & Technology - Summer 2013 - (Page 29)

INDUSTRY NEWS Comtech Telecommunications Corp. Awarded $2.5 Million to Support US Navy Satellite Communication Systems Comtech Telecommunications Corp. has announced that its Santa Clara, California-based subsidiary, Comtech Xicom Technology, Inc., has recently been awarded four contracts totaling $2.5 million for high-power dual-band traveling wave tube amplifiers (TWTAs) for the US Navy satellite communications systems. Comtech Xicom’s XTRD-2000C/X provides 2 KW of power from a rack-mounted system below-deck. The XTD-450T is antenna-mounted and provides more than 350 W of power. These amplifiers will help provide high priority, high capacity voice, data, and video to combat and support vessels. The US Navy terminals utilize X-band over the Defense Satellite Communications System (DSCS) or allied military satellites and C-band over commercial satellites. “Comtech Xicom’s high-power amplifiers provide reliable high data rate communications and are a critical component for the US Navy’s communications infrastructure,” said Fred Kornberg, president and CEO of Comtech Telecommunications Corp. “We are proud to receive these orders and to support this ongoing program.” Cree Ships Two Million GaN HEMT Devices for Telecom Infrastructure Cree, Inc. reports it has surpassed a significant milestone in shipping more than two million GaN High Electron Mobility Transistors (HEMT) for cellular telecommunications and is providing benefits over traditional silicon-based technologies, including higher power, higher efficiency and wider bandwidth. As mobile devices such as smartphones are becoming more widespread, telecommunications companies are looking for innovative technologies to improve channel capacity and speed of wireless systems, while simultaneously lowering power consumption of transmission amplifiers. The use of GaN HEMT in transmitter amplifiers is gaining attention in the cellular telecommunications industry due to the ability to decrease power consumption and size, and increase bandwidth capabilities. The world’s mobile networks are reported to consume about 120 TWh of electricity per year (for an average cost of $14.4 billion), and 50 percent of the networks power is consumed by power amplifiers and associated components. Consequently, improved power amplifier efficiency can result in considerable energy savings. “Wireless telecommunication leaders are leveraging the performance advantages of Cree’s GaN HEMTs,” said Tom Dekker, director sales and marketing, Cree RF Business Unit. “We are very pleased we achieved our two millionth GaN HEMT cellular telecom shipment milestone. GaN HEMT prices have greatly improved and are now a viable alternative to Si LDMOS transistors for cellular telecom amplifiers. We target continued growth of our telecommunication volumes.” The next-generation performance enabled by Cree GaN HEMT are required to support today’s 4G LTE cellular networks, as well as to help drive LTE release 10 and advanced LTE networks currently being developed. The improved efficiency and www.AntennasOnline.com bandwidth advantages of GaN HEMTs help LTE cellular network transmitters achieve smaller size, lower weight and improved thermal management compared with incumbent technologies. GaN HEMT power amplifiers allow for data channel bandwidths over 100 MHz and wide instantaneous RF bandwidths, helping operators aggregate multiple, non-adjacent frequencies to maximize the benefits of their licensed spectrum. Another significant advantage is improved transmitter efficiency, which offers tremendous energy savings for operating budgets. Jampro Antennas Awarded Contract by MediaCorp for Turnkey System Jampro Antennas of Sacramento, Calif. has been awarded a major broadcast equipment contract by MediaCorp, Singapore. Jampro will provide a complete system comprised of a Jampro model JUHD broadband UHF panel antenna and a complex switching and patching matrix to integrate MediaCorp’s three main towers that serve Singapore and the Malay Peninsula. In making the announcement, Alex M. Perchevitch, Jampro’s president said, “We are very pleased and proud to be working with Singapore’s leading media organization on their critical infrastructure. Fortunately, our extensive product line covers all of the necessary components. Moreover, we can ensure high performance because we are handling the entire installation in Bukit Batok, the primary Broadcast Site for Singapore and one of the most critical sites for Singapore, Malay Peninsula and Indonesian Archipelago.” Jampro will provide a broadband UHF panel antenna with dual runs of high power transmission line, a dual chain digital UHF combiner, comprising 12 constant impedance modules and crosssite patching matrix system, which allows transmission on different antennas/towers. Included in the order is a massive 48-panel JUHD UHF panel antenna, which can handle multiple channels DVB-T/H or analog, PAL signals on UHF bands IV and V. “We build our JUHD antennas with stainless steel and aluminum,” added Perchevitch. “That gives MediaCorp long term value and durable performance in their tropical rainforest climate.” To combine signals MediaCorp specified Jampro model DVB-T/T2 UHF constant impedance mask filter / combining modules. They provide outstanding low-power performance in a compact design, particularly suited to MediaCorp’s equipment space limitations. The DVB-T/T2 series combiner module and filter provides improved results in the bandpass and channel combining application. Each unit is electrically and mechanically pre-tested by Jampro to ensure superior level field performance. Jampro is also supplying dual runs of high power transmission line and accessories. Summer 2013 Antenna Systems & Technology 29 http://www.AntennasOnline.com

Table of Contents for the Digital Edition of Antenna Systems & Technology - Summer 2013

Antenna Systems & Technology - Summer 2013
Editor’s Choice
DAS Applications: Achieving Faster Data Throughput & Maintaining Optimal Connectivity in Challenging In-Building Environments
Antennas
AISG Solutions for Remote Electrical Tilt Antennas and Tower Mounted Amplifiers
Case Study: Simulating Stealth Antenna Patterns
Components/Subsystems
Materials/Manufacturing
Software/System Design
Test & Measurement
Marketplace
Industry News

Antenna Systems & Technology - Summer 2013