editor's blog
Subscribe Now

Two Ways to Tune an Antenna

We’ve looked at a couple of companies focusing on improving the performance of cell phone antennas in real time as conditions change. WiSpry (MEMS) and Peregrine (SOS CMOS) were two such examples. But Cavendish Kinetics came into the picture as well, and it turns out that there’s another layer of nuance as to what these companies do.

According to Cavendish, there are two ways to improve antenna performance: tune the impedance and tune the frequency. In the former case, you have an antenna that has to work with multiple frequencies, but is not specifically optimized for all of those frequencies. But as conditions or utilized bands change, the impedance matching may not be optimal. So companies like WiSpry and Peregrine provide capacitor networks that allow real-time tweaking of the impedance to reduce signal loss.

But Cavendish Kinetics claims to be doing something different: the capacitor arrays they create aren’t for adjusting the impedance; they’re for re-centering the frequency of the antenna. While they say that impedance tuning can improve the signal by 20% or so, they claim that they can get a 2X improvement in signal strength simply by tuning the antenna to whichever frequency is in use at a particular time.

We’ll look more at the specifics of how they create their capacitor arrays in a future story, but that’s secondary to the fact that they’re actually trying to solve a different problem than folks that, on the surface, would appear to be doing the same thing.

Leave a Reply

featured blogs
Jul 3, 2020
[From the last episode: We looked at CNNs for vision as well as other neural networks for other applications.] We'€™re going to take a quick detour into math today. For those of you that have done advanced math, this may be a review, or it might even seem to be talking down...
Jul 2, 2020
Using the bitwise operators in general, and employing them to perform masking operations in particular, can be extremely efficacious....
Jul 2, 2020
In June, we continued to upgrade several key pieces of content across the website, including more interactive product explorers on several pages and a homepage refresh. We also made a significant update to our product pages which allows logged-in users to see customer-specifi...

featured video

Product Update: What’s Hot in DesignWare® IP for PCIe® 5.0

Sponsored by Synopsys

Get the latest update on Synopsys' DesignWare Controller and PHY IP for PCIe 5.0 and how the low-latency, compact, power-efficient, and silicon-proven solution can enable your SoCs while reducing risk.

Click here for more information about DesignWare IP Solutions for PCI Express

Featured Paper

Cryptography: How It Helps in Our Digital World

Sponsored by Maxim Integrated

Gain a basic understanding of how cryptography works and how cryptography can help you protect your designs from security threats.

Click here to download the whitepaper

Featured Chalk Talk

Why Does a Medical Tool Need Security?

Sponsored by Mouser Electronics and Maxim Integrated

Connected Medical devices require a unique set of security design requirements and a software-only security solution with a non-secure MCU might not be the best way to go. In this episode of Chalk Talk, Amelia Dalton chats with Scott Jones from Maxim Integrated about the details of secure authentication and how we can use the SHA-3 authentication model to get our medical security plan on track.

Click here for more information about Maxim Integrated MAX66240 DeepCover® Secure Authenticator