The Opportunities and Challenges of LTE Unlicensed in 5 GHz
David Witkowski, Executive Director, Wireless Communications Initiative
In 1998, the Federal Communications Commission established the Unlicensed National Information Infrastructure or U-NII 5 GHz bands. These are used primarily for Wi-Fi networks in homes, offices, hotels, airports, and other public spaces and also consumer devices. U-NII is also used by wireless Internet Service Providers, linking public safety radio sites, and for monitoring and critical infrastructure such as gas/oil pipelines.

Uncertain Times for DefenseOpen’s Systems and Changes in DoD Procurement: This Time It’s Real
By Barry Manz

The U.S. Department of Defense has a well-earned reputation for inertia. Many proposals for change are made – but nothing happens. The COTS initiative, which promised cost savings through the use of off-the-shelf commercial parts, sounded terrific at the time. It heralded a major departure from standard DoD procurement that more or less guaranteed that every system would be different in part because it used parts that were developed from scratch, leading to “one-off” systems that were very expensive. Read More...


Band Reject Filter Series
Higher frequency band reject (notch) filters are designed to operate over the frequency range of .01 to 28 GHz. These filters are characterized by having the reverse properties of band pass filters and are offered in multiple topologies. Available in compact sizes.
RLC Electronics

SP6T RF Switch
JSW6-33DR+ is a medium power reflective SP6T RF switch, with reflective short on output ports in the off condition. Made using Silicon-on-Insulator process, it has very high IP3, a built-in CMOS driver and negative voltage generator.

Group Delay Equalized Bandpass Filter
Part number 2903 is a group delayed equalized elliptic type bandpass filter that has a typical 1 dB bandwidth of 94 MHz and a typical 60 dB bandwidth of 171 MHz. Insertion loss is <2 dB and group delay variation from 110 to 170 MHz is <3nsec.
KR Electronics

Absorptive Low Pass Filter
Model AF9350 is a UHF, low pass filter that covers the 10 to 500 MHz band and has an average power rating of 400W CW. It incurs a rejection of 45 dB minimum at the 750 to 3000 MHz band, and power rating of 25W CW from 501 to 5000 MHz.

LTE Band 14 Ceramic Duplexer
This high performance LTE ceramic duplexer was designed and built for use in public safety communication and commercial cellular applications. It operates in Band 14 and offers low insertion loss and high isolation to enable clear communications in the LTE network.
Networks International

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September 2012

Military Products

Nemesis Series Space Saver Connector
A rugged, lightweight, “no-profile” interconnect system was developed and designed specifically for wearable and portable military equipment used in modern warfare. The first interconnect system of its kind, the Nemesis Series Space Saver connector is a compact solution that not only saves weight, but also helps effectively shrink the overall size of portable equipment. The advanced connector system utilizes canted spring technology to provide blind mating and quick snap-on/rip-away coupling to prevent military personnel from being endangered should a cable snag. Other design considerations include the use of ribbed over-molding for secure grip under difficult conditions. Extremely rugged and with a high degree of sealing, the Nemesis Series Space Saver connector is designed to withstand harsh conditions in the field and features an anti-reflective RoHS-compliant salt-spray resistant plating that is guaranteed for 500 hours. It has superior EMI performance to ensure the integrity of high frequency signals, as well as pogo pin contact technology for enhanced contact durability. Its canted spring technology provides full 360º EMI protection.
ITT Corporation
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Band Pass Filter Chip with User Selectable Passband Frequency
The HMC897 is a band pass tunable filter chip which is ideal for pre-selection in advanced communications systems, military radar, EW/ECM, SATCOM, space, industrial and medical systems. Tunable over a 9 to 19 GHz frequency range, this new, ultra-compact, varactor-tuned MMIC filter is inherently stable and its small physical size and insensitivity to environmental conditions make it a superior alternative to competing resonant cavity tuned filters and large switched filter banks.
Hittite Microwave
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Vertically Integrated Spectrum Now Offers High Quality Specialty Connectors
The Spectrum Control line, acquired by API Technologies, now manufactures all components for its custom filtered and unfiltered connectors, including planar and tubular capacitors, shells, shields, seals and grommets. Complete in-house production allows Spectrum to maintain tighter quality control, resulting in a higher performing connector with a shorter lead time, all at a competitive cost. Audio, circular, and hermetically sealed connectors are available. The complete line of compact and extended shell filtered connectors provides a wide range of design flexibility. Compact shell filtered connectors offer an effective filtering device that reduces the amount of real estate required within a product enclosure. The extended shell connectors are ideal when a quick turnaround is required for prototype devices. Filtered connector styles include MIL-DTL-38999, MIL-DTL-83723, MIL-DTL-26482, MIL-DTL-55116 and MIL-DTL-24308, but custom designs are also offered.
API Technologies Corp.
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Two-Way Combiner/Divider
Model D9042 uses the company’s breakthrough technology to provide a new 2-way combining solution covering the full 3000 to 6000 MHz bandwidth. The D9042 is rated for 250W at the sum port, and operates with an insertion loss of only 0.25 dB maximum. This small package size measures just 2.03 x 2 x 0.87" and weighs 5 ounces. The unit offers excellent isolation of 15 dB minimum and is designed specifically for military and commercial applications.
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Two New Wideband LDMOS Transistors
Immediate availability and full design support capabilities for two new laterally diffused metal oxide semiconductor (LDMOS) transistors from Freescale Semiconductor has been announced. The highly versatile RF power FETs feature enhanced ruggedness of 65:1 VSWR and wideband operation over a broad 1 MHz to 2 GHz frequency range. The unmatched transistors are capable of delivering full CW rated power over the entire operating frequency range. The combination of integrated stability enhancements and optimized impedances allows for a simpler wideband implementation than previous generations of LDMOS transistors. The devices are housed in Freescale’s low thermal resistance packaging and are ideally suited for applications involving harsh conditions, including HF-UHF transmitters and transceivers, television transmitters, white space data transceivers, aerospace and defense systems, test equipment, and radar systems.
Richardson RFPD
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Higher Rating Achieved on RF Inductors for Military Market
The company has recently achieved failure rate Level R for its MIL-PRF-39010 RF inductors — ER10M and ER17S Series. These thru-hole series meet the military’s Qualified Product List (QPL) requirements for Established Reliability (ER). Such approval requires extensive testing for electrical, environmental, mechanical and thermal performance. Level R represents a 10X increase in reliability over the prior Level P rating for these two series. Each series has exceeded 10 million unit hours of life testing to date.
Gowanda Electronics
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GaN Broadband Power Amplifier
Model SSPA 0.020-6.000-35 is a high power, super broadband GaN RF amplifier that operates from 20 MHz to 6.0 GHz. This PA is ideal for broadband military platforms because it is robust and offers high power over an extremely large bandwidth with decent power added efficiency. This amplifier operates with a base plate temperature of -30 to +70ºC. It is packaged in a modular housing that is approximately 2.5 x 7.7 x 1.4". Weight is 2.0 pounds maximum. This amplifier has a typical saturated output power of 35W at room temperature. Noise figure at room temperature is 10 dB typical. Power flatness across the band is typically +/-3.0 dB with a typical power of 80W at 800 MHz and 20W at 6 GHz. Input and output VSWR is 2.0:1 typical. This PA operates from a +28 Vdc input voltage.
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Combination D-sub Connectors
A series of IP67-rated combination D-subminiature connectors delivers high reliability in rugged environments. Available in the latest one-piece “solid body” frame design, these IP67 rated combination D-sub connectors are supplied pre-populated with signal, high power or coaxial contacts. Available in standard combination pin configurations, the connectors are designed to provide a single-connector solution for harsh environment applications requiring a combination of power, signal and coaxial connections. The company uses only high quality, gold-plated machined contacts to make the best interface possible. The IP67-rated combination D-sub connectors feature a die-cast metal frame and O-ring to seal the connector to the panel. They are designed to interface directly with MIL-C-24308 connector standards. All plastic materials comply with UL94V-0 standards.
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