07.03.14 -- How To Properly Design An In-Building Distributed Antenna System: Part II
How To Properly Design An In-Building DAS, Part II By Bird Technologies
When a distributed antenna system (DAS) is designed incorrectly, it results in degraded performance, unnecessary cost increases, and dangerous conditions for emergency communications. This article provides the six best practices for achieving the most efficient radio frequency (RF) coverage distribution when designing an in-building (DAS).
Spotlight On Tunable RF Systems
Miniature VCTCXO (2.50 by 2.00 by 0.80 mm) This VCTCXO covers 10 to 52 MHz and measures in at 2.50 by 2.00 by 0.80 mm. It’s ideal for applications in telecommunications, avionics, military, industrial controls, and for integration into handheld test equipment.
Low-Loss, Digitally Tuned Bandpass Filters Software defined radios (SDR) and cognitive radios require flexible RF front ends, similar to the frequency hopping front ends of military communication radios. MtronPTI’s low-loss TF010x digitally tuned bandpass filters are designed for exactly that.
Coaxial Pulsed Magnetron The VMX3045 has a 400 W average output power, 400 kW peak output power, and is tunable from +/- 30 MHz. It is designed for linear accelerators.
Tunable Bandpass Filters Corry Micronics offers a wide range of mechanical tunable bandpass filters. These tunable bandpass filters cover a range from 900 MHz to 18 GHz, each covering an octave depending on the desired resolution. The easy-to-read indicator dials are pre-set and calibrated to offer the user direct frequency read outs.
48 V GaN-on-Si RF Power Transistor The NPT2018 is a GaN-on-Si (gallium nitride-on-silicon) RF power transistor with 48 V operation. It’s tunable from DC to 2.5 GHz, has a greater than 60 percent drain efficiency, and comes in an industry-standard plastic package.
SMT Silicon Hyperabrupt Tuning Varactor Diodes Skyworks’ SMV2026 series is a family of surface-mount tuning varactor diodes that are excellent for use as high-Q tuning elements in an RF voltage-controlled oscillator (VCO), voltage-controlled phase shifter, or tunable bandpass filter.
This compact and low-noise synthesizer is ideal for ATE and telecom/SATCOM applications, and it can also be used as a local oscillator (LO) for frequency converters. It covers the 0.4 GHz to 20 GHz frequency range.
Comnav recently updated its Dionysus filter design software. This new version corrects a few hidden bugs, corrects the limits on ceramic resonator style filters, and allows the user to set the bandwidth search in the analysis plot.
Looking for an exciting opportunity to be a part of the connectivity revolution and the Internet of Things? Look no further. Skyworks Solutions is hiring.
Skyworks’ design center in Cedar Rapids, Iowa, is searching for talented senior engineers interested in the design, test, layout, and prototype for numerous RF solutions powering today’s smartphones, tablets, and other mobile devices. Don't live in Cedar Rapids? No problem, Skyworks offers relocation assistance. Learn more or apply today.
Featured Products And Services
Spectrum And Signal Analyzer For Broadcast Applications