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.

MMD March 2014

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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

See all products in this issue

  Wednesday, November 25, 2015 - Featured Cover Products
  • Model SSK-ST573673-15-ITS1 is a V-band transmitter (upconverter) that emits two orthogonally polarized signals from 57 to 67 GHz. The transmitter takes 14.250 to 15.875 GHz/+0 dBm signal through an X4 active multiplier - more...

  • The M9420A 4-slot PXIe VXT vector transceiver provides signal generation and analysis with real-time FPGA accelerated measurements for faster throughput in manufacturing test of wireless components and IoT devices. - more...


  • PTRAN-100M18G-SFB-3UVPX-10HP-MAH is a 100 MHz to 18.0 GHz 3U OpenVPX transceiver (160m x 100mm x 10HP) utilizing the high-speed VITA 67 RF backplane connector This unit consumes less than 30W - more...


  • The RMHY3.2400-2500Sf is a 3 dB 90º quadrature hybrid for use in various applications within the FCC and ETSI sanctioned ISM band. It covers the 2.4 to 2.5 GHz band, offering typical electrical performance - more...


  Feature Articles

New High Performance Solution for Testing E-band Wireless Backhaul Equipment and Automotive Collision Avoidance Radars
By Anritsu Company

PXC021 Cellular/GPS Combiner
By Brian L. Wixon, Strategic Applications Manager - Filtronic

LDMOS RF Power Devices Drive Next Gen Avionics Systems
By Freescale Semiconductor, RF Division

New Wideband Signal Analysis: 5G Sets the Pace for Signal Analysis Growth
By Mariano Kimbara, Industry Analyst, Frost & Sullivan Test & Measurement

Five Techniques for Improving Analyzer Measurement Sensitivity and Accuracy in Noise
By Cherisa Kmetovicz, Keysight Technologies, Inc.

Eliminating Bias-Tees from Push-Pull Amplifier Outputs Using TCM3-452X+ 3:1 Unbalanced-to-Balanced Transformer
By Mini-Circuits

Understanding LTE Device Coexistence
By Detlev Liebl, Senior Application Engineer - Rohde & Schwarz

  Featured in November On The Market.
xxx Waveguide Directional Couplers
A new family of precision waveguide directional couplers consists of 28 models covering a frequency range from 18 to 110 GHz in seven popular frequency bands, including K, Ka, Q, U, V, E and W bands. They are offered with 10 or 20 dB coupling values.
Fairview Microwave
xxx Rack Mount Power Divider
This multi-band/multi-market RF/microwave 32-way splitter is available in Type N & SMA, 30W Wilkinson power dividers, optimized for excellent performance with industry leading specifications from 500 MHz to 6.00 GHz. Offering typical VSWRs ranging from 1.30:1, isolation of 18 dB typ.
xxx Microwave Path Alignment Kit
The high performance Microwave Path Alignment Kit is specifically designed to achieve a highly accurate positional path alignment, and will make microwave antenna installations fast and accurate, saving valuable time and money. The kit does not need to wait to find the signal from the opposite side. It uses very accurate positioning to sync both sides and relay the precise position.
Sunsight Instruments
xxx Cavity GPS Bandpass Filter with DC Path
Model 8RX7-1411.5-X389N21 has a passband of 1217 to 1606 MHz passing GPS L1 and L2 frequencies while rejecting extremely close Iridium and TACAN 123X signals. Utilizing a unique approach to achieving these specs, this filter exhibits low passband loss and a high level of unwanted signal attenuation, all while offering a DC thru path via the center conductor of the RF connector pins.
Reactel, Incorporated
xxx GaN Wideband Transistor
The NPT2020 GaN HEMT is a wideband transistor optimized for DC to 3.5 GHz operation. This device supports CW, pulsed, and linear operation with output power levels to 50W (47 dBm) in an industry standard surface mount package. It is ideally suited for defense communications, land mobile radio, avionics, wireless infrastructure, IMS applications, and VHF/UHF/L/S-band radar. The unit is built using the SIGANTIC® process, a proprietary GaN-on-Silicon technology, and is 100% RF tested.
   Industry News
AR RF/Microwave Instrumentation To Help U.S. Army Modernize EMRE Test Complex
Frost & Sullivan Survey on Rental T&M
NRAO and Mini-Circuits Forge New Partnership to Enable Commercial Development of Cascadable Absorptive RF Filters
RFMW Announces Two Appointments
The Next Generation Space Interconnect Standard (NGSIS)
DHS and NASA Show Off Radar FINDER System
Microwave Radiation Tasty Solution for Killing Pesty Snails?
Navy Launches UAV “Swarms”
FCC May Open Up Radar Bands for Cellular on Shared Basis
France Military Says Wind Turbines Are Threat to Security
Samsung, Apple Lead Smartphone Sales in First Quarter
U.S. Navy Leads All Governments for Patent Filings for Sixth Straight Year
FCC Offers %1.65 to Wireless Carriers for Rural Broadband Deployment
Sprint Inks Deal with Boingo for Wi-Fi Offload at Airports
Author's Note Regarding "Nonlinear Circuit Analysis in Time and Frequency Domain -- Example: The Forced Van-der-Pol Oscillator," MPD, April 2015
   White Papers

The Design of Ultra Narrowband Amplifiers Using Small-Signal Varactor Upconverters
This paper presents a method of realizing tunable microwave amplifiers with ultra narrow bandwidths that can be less than 0.5% by the use of a varactor up-converter (UC).
Planar Monolithics

Directivity and VSWR Measurements
Return loss and VSWR measurements are complicated by the finite performance of the directional device used to measure the reflected power. The only accurate and convenient way to make return loss measurements is with a well matched high directivity directional coupler or bridge.
Marki Microwave

Switch Solutions for Systems with Low PIM Requirements
Dow-Key Microwave has invested in R&D for new RF switch products designed specifically to reduce intermodulation (IM) in coaxial switches.
Dow-Key Microwave

How to Specify RF and Microwave Filters
Covers cavity, ceramic, LC, crystal and helical filters.
Anatech Electronics

Mounting Considerations for Medium Power Surface-Mount RF Devices
Covers all factors that must be considered when mounting SMT devices.
TriQuint Semiconductor

Biasing MMIC Amplifiers
How to bias MMICs along with theory and techniques.


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Uncertain Times for DefenseWill OpenRFM Shake Up the Microwave Industry?
By Barry Manz

Throughout the history of the RF and microwave industry there has never been a form factor standardizing the electromechanical, software, control plane, and thermal interfaces used by integrated microwave assemblies (IMAs) employed in defense systems. Rather, every system has been built to meet the requirements of a specific system, which may be but probably isn’t compatible with any other system. It’s simply the way the industry has always responded to requests from subcontractors that in turn must meet the physical, electrical, and RF requirements of prime contractors. Read More...

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