Designing efficient antennas for cell phones isn't easy, even when they only operate in one or two relatively narrow frequency bands. It becomes even more difficult if the antenna needs to provide reception over the entire UHF TV band or include coverage of some of the new spectrum becoming available to mobile operators outside traditional cell phone and PCS bands.
Peregrine Semiconductor Corporation says its "DuNE" technology is the solution.
"One of the most significant challenges facing the mobile handset designers is the poor antenna performance for multi-band multi-mode handsets," Tero Ranta, manager for advanced technology at Peregrine, said in a news release Monday. "Dynamically tuning the antenna to compensate for the increasing bandwidth requirements and environmental effects will significantly improve the antenna performance."
Ranta added that should the demand for additional services develop for mobile television (DVB-H or ISDB-T), the requirement for antenna tuning becomes critical.
"Until now, no tunable element met the needs of the mobile products industry in power handling, reliability, high volume production and integration," Ranta said. "Peregrine's DuNE Technology is the key to unlocking the future of digital tunability in mobile RF systems."
The Peregrine tunable capacitors can be designed with capacitance values ranging from 0.5 pf to 10 pf with typical tuning ratios ranging from 3.1 to 6.1. The "Q" of the capacitors ranges from 40 to 80 at 1 to 2 GHz. The capacitance is digitally controlled, proving 5 bits or 32 states of resolution. They can handle over 38 dBm of power in a 50-ohm circuit. More information is available on the DuNE Antenna Tuning Technology Web page.
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Doug Lung is one of America's foremost authorities on broadcast RF technology. As vice president of Broadcast Technology for NBCUniversal Local, H. Douglas Lung leads NBC and Telemundo-owned stations’ RF and transmission affairs, including microwave, radars, satellite uplinks, and FCC technical filings. Beginning his career in 1976 at KSCI in Los Angeles, Lung has nearly 50 years of experience in broadcast television engineering. Beginning in 1985, he led the engineering department for what was to become the Telemundo network and station group, assisting in the design, construction and installation of the company’s broadcast and cable facilities. Other projects include work on the launch of Hawaii’s first UHF TV station, the rollout and testing of the ATSC mobile-handheld standard, and software development related to the incentive auction TV spectrum repack.
A longtime columnist for TV Technology, Doug is also a regular contributor to IEEE Broadcast Technology. He is the recipient of the 2023 NAB Television Engineering Award. He also received a Tech Leadership Award from TV Tech publisher Future plc in 2021 and is a member of the IEEE Broadcast Technology Society and the Society of Broadcast Engineers.