Antenna Systems & Technology - Spring 2015 - (Page 17)

COMPONENTS / SUBSYSTEMS NEW PRODUCTS & SERVICES QMA Cable Assembly with Verifiable Low PIM Performance for DAS Applications LTE networks are more acute in decreased system performance due to interference caused by Passive Intermodulation (PIM) in Distributed Antenna Systems (DAS). Traditional cable assemblies with QMA connectors may be a source of PIM. QMA connectors feature a snap lock connection as an alternative to threaded SMA connectors. QMA with electrical performance up to 6 GHz is used in wireless infrastructure applications including DAS. RF Industries manufactures cable assemblies using Times Microwave TFT402-LF plenum rated, low loss, low PIM flexible cable terminated with QMA male straight or right angle connectors. The cable assemblies meet UL910 fire requirements for in building applications. PIM performance is less than -140 dBc using two tones at 20 watts. Less than -155 dBc PIM performance is available on premium QMA straight assemblies. All low PIM cable assemblies manufactured by RF Industries are tested to certify they meet or exceed the advertised specifications. The PIM value is printed on the cable assembly along with a serial number. For verification, a complete PIM performance chart is available for download by entering the cable serial number using PIM Tracker on the RF Industries website. Assemblies are available in standard 1 and 2 meter lengths as well as custom lengths. In addition to QMA connectors, the assemblies can be terminated with SMA, N, 7-16 DIN and 4.1 to 9.5 (Mini) DIN connectors. New Ultra-Broadband and Millimeter Wave Low Noise Amplifiers Pasternack has launched a line of ultra-broadband and millimeter wave low noise amplifiers that are in-stock and available to ship same-day. These new high frequency LNAs offer very low noise figure levels, typically between 2.5 and 3 dB across the entire band, making them well suited for use in applications such as electronic warfare, instrumentation, fiber optic communication systems, military communications, radar, SATCOM, pointto-point radio links, telecom and R&D. Pasternack's release of RF amplifiers includes 17 models covering multioctave bandwidths with flat gain response and feature highly efficient GaAs PHEMT semiconductor technology. 50 ohm hybrid MIC circuits are enclosed in environmentally sealed metal packages with nickel or gold plating. These low noise amplifiers come with either stainless steel SMA or 2.92 mm connectors and some packages are hermetically sealed with field replaceable connectors, making these units durable and able to withstand harsh environmental conditions. The 2.92 mm connectorized models operate to 40 GHz. The ultra-broadband and millimeter wave LNAs have IP3 levels as high as +42 dBm, low VSWR and are unconditionally stable. DC voltage supply ranges from +12 to +15 VDC while bias current ranges from 80 mA to 1300 mA. The voltage supply is internally regulated. The broadband low noise amplifiers from Pasternack contain internal circuits including DC blocking capacitors at the RF input/output ports and are guaranteed to operate over a temperature swing from -20°C to 70°C. "We are continually expanding our lines of off-the-shelf RF amplifiers to meet the needs of our customers and current market trends," said Tim Galla, Active RF Components product manager at Pasternack. "This selection of ultra-broadband, low noise amplifiers offers designers many options for highly linear gain and output power levels that cover a wide variety of applications for RF, microwave and millimeter wave frequency bands." For more components visit www.antennasonline.com/main/category/markets/components-subsystems. www.AntennasOnline.com Spring 2015 Antenna Systems & Technology 17 http://www.antennasonline.com/main/category/markets/components-subsystems http://www.AntennasOnline.com

Table of Contents for the Digital Edition of Antenna Systems & Technology - Spring 2015

Editor’s Choice
Base Station Antenna Selection for LTE Networks
Anticipating and Satisfying a Rising Demand for Wireless Communication Systems
Antennas
Components/Subsystems
Software / System Design
Test & Measurement
Industry News
Marketplace
CPRI Overcomes Head-End Challenges for DAS in Large Venues

Antenna Systems & Technology - Spring 2015