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WEBMicrowaves & RF reports on the latest insights, news, and advancements in the wireless industry, and the microwave and radio-frequency engineering world.
Understanding Mixers and Their Parameters - Microwaves & RF
WEBJul 8, 2015 · 1. These simple diagrams provide an illustration of frequency conversion. (Courtesy of Marki Microwave) In the tutorial, “Mixer Basics Primer,” Ferenc Marki and Christopher Marki explain, “Two of a mixer’s three ports serve as inputs, while the other port serves as an output port.An ideal mixer produces an output that consists of the sum and difference frequencies of its two input signals.
Introduction to RF & Wireless Communications Systems
WEBOct 13, 2017 · RF itself has become synonymous with wireless and high-frequency signals, describing anything from AM radio between 535 kHz and 1605 kHz to computer local area networks (LANs) at 2.4 GHz. However, RF has traditionally defined frequencies from a few kHz to roughly 1 GHz. If one considers microwave frequencies as RF, this range extends to …
Where Are They Now? - Microwaves & RF
WEBDec 5, 2011 · LNR Communications is now part of L3-Narda in Hauppauge, NY. Logimetrics (a supplier of laboratory-grade traveling-wave-tube amplifiers) was absorbed into Instruments For Industry (IFI). IFI has confirmed that several of the Logimetrics guys are there and they can evaluate and/or repair Logimetrics amps.
Learn About Circulators and Isolators | Microwaves & RF
WEBAug 20, 2016 · Circulators and isolators are three-port passive electronic devices that help direct the flow of microwave signals in RF equipment and systems. A port is defined as a connection point for either an input signal, output signal, or termination. Figure 1a shows the standard schematic symbol for a circulator. The arrow indicates the unidirectional ...
Doherty Amplifier Combines High Power and Efficiency
WEBOct 7, 2017 · This is the best result in industry in terms of power gain flatness, output power, and back-off efficiency achieved over a wide frequency bandwidth of 1.8 to 2.2 GHz. High backoff efficiency, above 50%, and high-power gain, about 12 dB, can be achieved from 1.8 to 2.2 GHz at an exceptionally high output-power level of about 1 kW corresponding ...
What’s the Difference Between Broadband and Narrowband RF ...
WEBNov 15, 2014 · For its part, narrowband refers to communications that use frequency content within the coherence band of a frequency channel. Generally, it refers to frequency operation that is narrower than broadband. Of course, these definitions somewhat depend upon applications as well. As a result, it is easier to focus on particular technological ...
Comparing Narrowband and Wideband Channels - Microwaves & RF
WEBFeb 7, 2018 · Download this article as a .PDF. Bandwidth is limited at all frequencies. This holds true whether we’re discussing those in the kilohertz range used for amplitude-modulated (AM) radio broadcasting; microwaves and millimeter waves for commercial and military radar systems; or those frequencies bands with the shortest-wavelength electromagnetic (EM) signals, including infrared (IR ...
6 Types of Resonators Used Across the RF/Microwave Universe
WEBSep 9, 2015 · 1. These ceramic resonators can be used in applications spanning 200 MHz to 10 GHz. (Courtesy of Integrated Microwave Corp.) Resonators are key to the performance of a range of RF/microwave components, such as oscillators and filters. The types of available resonators include coaxial, dielectric, crystal, …
Microwave Diodes… Why a Schottky-barrier? Why a Point-contact?
WEBDec 9, 2013 · March, 1968. Since World War II, the point-contact diode has been the most useful converter of microwave signals to lower frequencies. Now, a new device—the Schottky-barrier diode—is claimed to offer improved electrical efficiency and higher reliability for this and other applications. A comprehensive evaluation of …
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