RF filters Archives - 5G Technology World

5G altimeter interference: aviation versus telecoms

Martin Rowe — Thu, 23 Dec 2021 17:23:23 +0000

The auctioning of the C-band for 5G use has raised concerns in North America that signals could interfere with aircraft altimeter operations. 5GTW asked a filter engineer and a test expert if there's a problem and how to fix it.

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BAW filters keep RF interference out

Martin Rowe — Tue, 23 Nov 2021 23:23:46 +0000

Qualcomm’s ultraBAW filters cover 2.7 GHz to 7.2 GHz, keeping cellular and Wi-Fi in place. Qualcomm explains how the filters work. Each time a government auctions off a slice of spectrum for cellular use, the airwaves get more crowded as users begin occupying the new frequencies. In the days when spectrum wasn’t so scarce, cellular…

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ETSI launches intelligent surfaces effort

Martin Rowe — Tue, 05 Oct 2021 03:56:30 +0000

A standards group will seek to define a technology for steering reflection of wireless signals.

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Marki adds four models to diplexer line

Martin Rowe — Thu, 23 Sep 2021 18:43:03 +0000

Four new models cover DC to 26.5 GHz at different crossover frequencies.

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Filters keep RF signals in line

Martin Rowe — Fri, 17 Sep 2021 20:06:05 +0000

In a video interview with 5G Technology World, Resonant’s Mike Eddy explains how RF filters keep wanted signals in an interference out. It’s all in the physics. As bandwidth gets crowded, governments auction more spectrum to accommodate our insatiable demand for data. While 3G used frequencies around 1 GHz, 4G expanded to around 2 GHz.…

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Video: “Ideal” switch cuts signal losses

Martin Rowe — Mon, 31 Aug 2020 18:37:12 +0000

A MEMS RF switch from Menlo Micro helps eliminate the decision of whether to design a semiconductor or mechanical switch into your circuits.

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Isolators cut reverse-traveling signals at mmWave frequencies

Martin Rowe — Thu, 16 Jan 2020 17:27:54 +0000

To minimize issues from standing waves, engineers have long used Faraday rotation isolators that let forward-traveling signals pass to the load while attenuating reverse-traveling signals such as reflections. Higher frequencies, however, bring a new set of problems such as insertion loss that Micro Harmonics claims to have solved with its mmWave isolators. The series consists…

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