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Author: Mark Hoffman

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WHAT ARE MICROWAVE PHASE SHIFTERS?

Microwave phase shifters are devices that alter the phase of the electromagnetic oscillations at the output of a microwave transmission line, with respect to the phase of the oscillations at the input of the line. The phase of a transmission line can be shifted by increasing the length/time of the transmission line or by altering the wavelength.

In microwave solutions, phase shifters are passive microwave devices that change the phase angle of an RF signal. RF waves can combine to strengthen or weaken a signal, depending on if the waves are identical or different. Identical frequencies will strengthen a signal, whereas opposing ones will weaken it. Phase shifters change the angle of an RF signal so that it doesn’t interfere with the wrong signals. This technology maintains strong performance by providing low insertion loss.

We can understand this concept better by considering noise-cancelling headphones, which use some phase shifting principles. In an audio application, instead of adjusting RF and microwave energy, the shift involves the phase of an audio wave in relationship to another wave. Noise-canceling headphones reduce noise by inserting a sound wave that is 180 degrees out of phase with the surrounding noise. The new sound wave has been shifted to cancel out the first wave, thus reducing the noise you hear.

This noise-cancelling example illustrates an extreme result that we do not typically see in microwave applications. Generally, microwave phase shifters only need to change minor increments of a wavelength to achieve the desired performance results.

Phase shifters are used in a variety of applications, including phase modulators, frequency up-converters, testing instruments and phased array antennas. Radiall designs and manufactures analog phase shifters for microwave components and coaxial phase shifters for space qualified components.

Altum RF is a ACETEC.com principal. Visit Altum RF to find out more about their capabilities.

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Design of a mmWave MIMO Radar

This article written by Tero Kiuru and Henrik Forstén, VTT Technical Research Centre of Finland Ltd., Espoo, Finland. Full article is here: Design of a mmWave MIMO Radar | 2021-01-10 | Microwave Journal

Radar uses reflected radio waves to determine the range, angle or velocity of objects. These detection systems, which were once the exclusive domain of the aerospace and defense industry, are now gaining popularity in the consumer industry, most notably for automotive radar applications used in adaptive cruise control and autonomous driving assistance systems.

The complete article in the January, 2021 issue of Microwave Journal

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Akoustis Technology Optimized for 5G & WiFi 6E

Next generation connectivity architectures are demanding solutions that support high-frequency, ultra-wideband, and high-power coexistence RF filter. Years of R&D have uniquely positioned us to handle the industry’s challenges and push the boundaries of what’s possible bringing you the highest quality filter solutions in the market.

All the latest news from Akoustis

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Full Steam Ahead…Everybody Jumping on The MM- Wave Train

Apple, Facebook, SpaceX and new companies like Starry just to name a few. The millimeter wave scene continues to heat up as companies look to mm-wave based solutions to expand and solve the next generation of broadband needs. Below are some highlights to what some companies are doing in the mm-wave industry that look to make it a mainstream technology used everyday by consumers. Here are a few headlines with links to full articles to enjoy:

 

Apple Invents Wireless Charging iPhone Case Accessory using Millimeter Wave Technology

The circuitry that receives the wireless power may receive wireless power at microwave frequencies and as a communication device using an array of antennas may be used to support beam steering. The array of antennas may support wireless communications in millimeter wave communications bands such as a communications band at 60 GHz or other extremely high frequency communications bands. Read More…

 

Facebook’s Millimeter-wave radio tech hits new bandwidth records

Facebook’s millimeter-wave (MMW) radio technology, which can be used for drone-to-ground communications or for more traditional terrestrial applications, keeps getting better. Last year, the team was able to set up channels with data rates of up to 20 Gbps over about eight miles. Read More…

 

AT&T Launches Second 5G Wireless Network Test in Austin, Tx

Recently, AT&T launched the second trial using millimeter wave (mmWave) technology to deliver an ultra-fast 5G network experience to more locations in Austin, Texas. Read More…

 

The FCC gave Apple permission to test 5G transmission between Northern California facilities

Based on the application, Apple will conduct its testing in high-band frequencies ranging from 27.5 GHz to 28.35 GHz and 38.6 GHz to 40 GHz. The experimental link will span about 10 miles between facilities in Cupertino and Milpitas, California. Read More…

 

Starry Wants to Change The Way You Connect using Millimeter Waves

He’s back and ready to change the internet forever. Chet Kanojia–the former CEO of streaming TV startup Aereo, whose challenge to traditional cable companies was quashed by the Supreme Court in 2014 looks to use mm-wave solutions to provide high speed access to homes. Read More…

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