advertisment Advertisement
advertisment Advertisement
advertisment Advertisement
advertisment Advertisement

White Papers

Getting the Right Outdoor Communications Connectors

A shift in system design is taking place that drastically changes the connectivity in base station architectures. Older architectures use heavy coax cable between base stations and amplifiers, and between the amplifiers and passive antennas.


Read More

Correlation-Based Spatial Channel Modeling

Correlation-based modeling refers to the correlation that is present between samples. This can be correlation in the time, frequency, or spatial domains. For channel modeling purposes, it generally includes all three.
Read More

Reconfigurable And Cost-Effective FET Mixer

This paper describes a reconfigurable resistive passive FET mixer co-designed with a reconfigurable VCO (voltage controlled oscillator) that acts as a LO (local oscillator), can operate with low noise figure, and high dynamic range without the need of external BALUN (balance-to-unbalance) network. The typical measured input intercept points (IIP3) and conversion loss is 38dBm and 8.5dB with the LO power typically 15dBm for the frequency bands (RF: 700-2300MHz, LO: 650-2100MHz, IF: 50-200MHz).
Read More

The Class M™ Linearization System and Its Application

An excellent technique for on channel linearization enhancement is feedback of the incident signal from output to input, provided sufficient loop gain and phase margin exist within the system. Class M™ is an example of a pulse shaping system for complex envelope modulation control that employs real time feedback at radio frequency to maintain high levels of distortion correction and loop stability.
Read More

Wireless and Stimulus: A Perfect Match

When it comes to securing broadband stimulus funds, network providers are currently faced with some fairly uncertain circumstances. Challenged with navigating through the uncertain fund allocation process, operators continue to struggle with determining how to write a convincing and winning application and choosing the right solution, technology and vendor to best suit their specific needs.
Read More

Generating X-parameters from Circuit-level Designs

X-parameters represent a new category of nonlinear network parameters for high-frequency design and are used for characterizing the amplitudes and relative phase of harmonics generated by the nonlinear behavior of components. Developed and introduced by Agilent Technologies, X-parameters are applicable to both large-signal and small-signal conditions, and for linear and nonlinear components. They correctly characterize impedance mismatches and frequency mixing behavior to allow accurate simulation of cascaded nonlinear X-parameter blocks (e.g., amplifiers and mixers), in wireless design. X-parameters play a key role in the development of active devices like the power amplifier (PA) and mixers—critical components in today’s wireless designs.
Read More

Advances in S-Band Radar Technology

This white paper looks at reducing overall system cost through higher levels of integration made possible through specific semiconductor technologies.
Read More

Understanding Long-Term Evolution Fundamentals and Measurement Challenges

The Universal Mobile Telecommunication System (UMTS), the successor to GSM, is steadily increasing its penetration of the world’s wireless communications markets, and is likely over time to become the primary standard used by not just the current 85% wireless carriers, but by virtually all of them. Its most promising emerging enhancement, Long-Term Evolution (LTE), has moved further along in the standards-setting process and on to the path of initial deployment.
Read More

A Comparison Between Thin Film and Thick Film Capacitors

Capacitor technology is constantly evolving and advancing to meet design engineers’ requirements as they develop the latest electronic designs. Whether a new design or redesign is driven by size or performance requirements (or both), design engineers are in need of advanced components that enable them to produce smaller, faster, higher performance designs.
Read More

Satellite DVB-RCS Standards for Fixed and Mobile Commercial and Military Applications

The first generation of satellite standard of DVB-S known as Digital Video Broadcasting-Return Channel via Satellite (DVB-RCS) about ten years ago quickly became around the globe one of the key solutions in almost every new satellite communication project for broadcast, broadband and multimedia interactive applications including high-speed Internet. The second generation of DVB-S2 CCM (Constant Coding Modulation) standard was presented a few years ago as a new more cost effective, efficient, reliable, secure and functional solution. The DVB-S2 CCM can be upgraded and cost less than the third generation of DVB-S2 ACM (Adaptive Coded Modulation) platform, forward and reverse compatible. In this article will be introduced the latest DVB-S2 Space and Ground segments, respectively, for interactive transmission of Voice, Data and Video (VDV) over IP (VDVoIP). The Ground Segment will be represented by HUB as GES (Ground Earth Station) and VSAT equipment known Satellite Interactive Terminal (SIT) or Remotes, compliant to all DVB-RCS standards for civilian and military solutions.
Read More

Sign-In

Forgot your password?

No Account? Sign Up!

Get access to premium content and e-newsletters by registering on the web site.  You can also subscribe to Microwave Journal magazine.

Sign-Up

advertisment Advertisement