Designing 5G Devices with ADS: New Tutorial from Plextek RFI

Blog Post created by annamccowan Employee on Aug 4, 2017

Demands for faster data speeds and more reliable services are at an all-time high. 5G is predicted to meet these demands, and much more. Although 5G is currently still in the planning stages, researchers are uncovering solutions that were previously thought impossible. Until recently, mm-waves have been viewed as unsuitable for mobile communication. However, new research has shown that propagation issues can be overcome, with help from mm-wave small-circuit designs.


Plextek RFI is a leading company in 5G design, specializing in the design and development of RFICs, MMICs and microwave/mm-wave modules. The designers at Plextek RFI manage their own RF On Wafer (RFOW) test facility, providing several leading foundries highly developed design services. Their designs are used in a wide range of applications from test instrumentation to infrastructure equipment and the latest mm-wave 5G systems.


Plextek RFI also has a growing archive of video tutorials on various design topics in a wide range of applications from test instrumentation to infrastructure equipment and the latest mm-wave 5G systems.

The most recent video tutorial provides a visual demonstration of the design, layout, and performance of a Dual-Band 5G Power Amp using Keysight ADS.


dual band layout

Figure 1. Full layout of a mm-wave 5G dual-band power amplifier.


Dual-band power amps are vastly popular in proposed 5G designs due to the wide range of frequencies used in 5G applications. They perform almost as well as two single-band PAs combined, as they are capable of electronically switching their operating band between the 26GHz and 32GHz 5G bands. They are small, inexpensive, and with ADS, easy to design.


ADS schematic of dual-band PA

Figure 2: ADS schematic of three-stage dual-band power amplifier.


s-parameters pf PHEMT switch transistor

Figure 3: S-parameters vs. frequency of a pHEMT switch transistor, used to alter effects of transmission lines in low and high bands.



Watch the 20-minute tutorial video to dive further into each stage of the power amp design, and to see the effects of the pHEMT switch by simulating the S-parameters at high and low band.


For more information on Plextek RFI, go to here.


See more tutorials by Plextek RFI here.



If you are interested in learning more about 5G design using ADS, an upcoming webcast will cover the “Circuit Design Phase” of a 5G system done all in ADS.

Click here to watch the webcast.


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Apply for a free trial of ADS.