Understanding Mixers and Their Parameters - Microwaves & RF
网页2015年7月8日 · Understanding Mixers and Their Parameters. Mixers remain an important part of most RF/microwave systems, prompting the need to understand this vital component and its parameters. Download this article in .PDF format. A mixer is a three-port component, which performs the task of frequency conversion. …
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Marines Modernize with L3Harris HF Radios - Microwaves & RF
网页2019年12月18日 · The U.S. Marine Corps has selected Falcon III AN/PRC-160 high-frequency (HF) portable radios from L3Harris to replace legacy L3Harris HF radios. The $50 million follow-on delivery order is part of the Navy Portable Radio Program five-year IDIQ contract received in 2017 and is part of the Marines’ High Frequency Radio II …
Doherty Amplifier Combines High Power and Efficiency
网页2017年10月7日 · 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 …
Where Are They Now? - Microwaves & RF
网页2011年12月5日 · 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
网页2016年8月20日 · 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 ...
Introduction to RF & Wireless Communications Systems
网页2017年10月13日 · 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 300 GHz.
Comparing Narrowband and Wideband Channels - Microwaves & RF
网页2018年2月7日 · In short, wideband channels can carry more information than narrowband channels, but they typically require more power to do so. Narrowband channels typically carry much less information than wideband channels and operate over shorter distances between transmitter and receiver. But because narrowband channels have less noise and typically lower ...
Tracking Generators Enhance Spectrum Analysis - Microwaves & RF
网页2004年7月29日 · Figure 1 shows a common RF spectrum analyze architecture with the tracking generator function implemented with a mixer, amplifier, and RF signal generator set to a fixed first intermediate frequency (IF). This approach works provided that the analyzer sweeps only the first local oscillator (LO) to achieve the frequency scan. Also, the analyzer must provide a sample output of the first LO.
The Critical Role OTA Testing Will Play in 5G - Microwaves & RF
网页2019年3月1日 · OTA Overview. As 5G mobile technology evolves to millimeter-wave (mmWave) frequencies of 28 GHz, 39 GHz, and beyond, several drivers will necessitate OTA testing. At mmWave frequencies, signal-absorption rates are much higher, requiring the need for directional transmissions/reception (beam focusing or …
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