Extracting Space from Aerospace & Defense By Dale Robinette, CEO, EPIQ Space
When you consider the $195 billion1 global space business, one would think the revenue would merit tracking this industry segment on its own. Satellite Manufacturing Revenue was estimated to be approximately $15.7 billion2 in 2013. Read More...
FROM WHERE WE SIT
Will 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...
CURRENT ISSUE PRODUCTS
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. Mini-Circuits
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. Werlatone
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
Sprint is replacing its 3G and Nextel networks with Network Vision, one of the results of which is that it will probably reduce the company's total number of towers by more than 44%, from 68,000 to 38,000 sites. Sites that serve Nextel (9.600 in all) will be decommissioned by the end of the year according to a transcript of the carrier's fourth quarter earnings call. Sprint now leases its required 38,000 sites for Network Vision and hopes to have 12,000 higher-density sites on the air by the end of this year. The goal for having the entire network deployed is the end of 2013 or the first half of 2014.
The company's transition to Network Vision will take place in two steps. If there are six existing CDMA antennas on a site (two per sector), one CDMA antenna will be removed and two LTE antennas will be deployed per sector. Then all CDMA antennas will be taken down, leaving six LTE antennas. Sprint signed agreements with the major tower companies late last year and early this year announced it will deploy LTE in Atlanta, Dallas, Houston, Baltimore, Kansas City and San Antonio by the middle of the year by midyear.
•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. Mini-Circuits