Balancing Performance with Compact Quadrature Hybrid Couplers

Posted by Dave Thibado on Feb 17, 2021 10:42:00 AM

Quadrature hybrid couplers are basic building blocks for many RF and microwave systems. For these couplers, the input splits into two output signals, of equal magnitude, with a 90 degree phase difference. Quadrature hybrid couplers provide improved input match for unbalanced loads. Energy splits evenly between outputs, and some energy is reflected back due to mismatch. For example, in Figure 1, there is a 90 degree phase difference between the two outputs, so the energy reflected at point A is 180 degree out of phase and cancels at the input port. At point B, the energy is in phase and sums at the isolated port, which is terminated.

Read More

Topics: RF and Microwave

Part 2: Know Today’s RF Filtering Trends to Better Meet the Needs of Tomorrow’s RF Design Jobs

Posted by Jared Burdick on Feb 3, 2021 9:00:00 AM

In part one of our two-part RF filter trends series, we discussed several emerging trends effecting the “jobs” RF filters need to perform. In this second part, we expand on these trends by digging into more of the technical trends and providing an overview of the filtering solutions that can help RF filter designers stay on top of those trends.

Read More

Topics: RF and Microwave, Filtering

From the C Band to the V Band: A Year of Big RF Spectrum Changes in the US

Posted by Peter Matthews on Jan 13, 2021 9:00:00 AM

Looking back, 2020 was a year full of big changes regarding how RF spectrum is allocated in the US. Led by the Federal Communications Commission (FCC), multiple portions of the spectrum ranging from the C band to the V band were either opened to new uses and/or auctioned to new users throughout the year. These changes are driving a variety of new opportunities for wireless device manufacturers and broadband and cellular carriers, which is resulting in a range of exciting new challenges for RF technology vendors to help solve. 

Read More

Topics: 5G, News and Events, RF and Microwave

Duplex, Duplexer, Diplexer?

Posted by Peter Matthews on Dec 30, 2020 6:00:00 AM

One of the things all technical disciplines excel at is creating terminology that can trip up those who are not accustomed to speaking the language every day. Take the title of this article for example. These three words sound similar and are definitely inter-related, but they are not inter-changeable.

Read More

Topics: RF and Microwave

You Need to Reduce SWaP – Our High K Dielectrics Can Get the Job Done

Posted by Jared Burdick on Dec 9, 2020 8:00:00 AM

As an RF engineer, whether you are building a 5G antenna to mount on top of a street light or a satellite that will be launched into space, you are likely being asked to reduce three key factors – size, weight, and power (SWaP). The need to reduce SWaP is becoming increasingly common, but also increasingly tricky, because even though wavelength and the corresponding critical dimensions decrease as frequency goes up, RF circuits generally scale in size and complexity with the wavelengths supported. Thus, it can be really difficult to find companies who are up for the challenge of providing components that are designed to help reduce SWaP

Read More

Topics: RF and Microwave, Military and Aerospace, Filtering

Build-to-Print Basics Part 6: Metallization

Posted by Tim Bice on Dec 2, 2020 8:15:00 AM

To provide a better understanding of build-to-print in general and the breadth of our offerings, as well as how our thin-film technology can benefit your applications, we’ve put together a Build-to-Print Basics series. Part 6 covers the various aspects of metallization that we consider to determine the best fit for our customer’s build-to-print applications.

Read More

Topics: RF and Microwave

You Have a Filtering Job to Do – We Have the Right Candidate for You

Posted by Dave Thibado on Nov 18, 2020 8:00:00 AM

When designing an RF or microwave application, you will always need some level of filtering to attenuate or remove unwanted signals from the desired channel. Since the end goal of what a filter must accomplish is quite broad, it may seem daunting to know what qualities to look for in a filter to get there.

Read More

Topics: 5G, RF and Microwave, Filtering

Build-to-Print Basics Part 5: Substrate Selection

Posted by Tim Bice on Nov 11, 2020 8:08:00 AM

To provide a better understanding of build-to-print in general and the breadth of our offerings, as well as how our thin-film technology can benefit your applications, we’ve put together a Build-to-Print Basics series. Part 5 provides an overview of the common and custom materials we typically use and information on how we can work together to determine the best option for your application.

Read More

Topics: RF and Microwave

Know Today’s RF Filtering Trends to Better Meet the Needs of Tomorrow’s RF Design Jobs

Posted by Peter Matthews on Nov 4, 2020 8:00:00 AM

At any given time, there are a multitude of signals at a variety of frequencies streaming all around us. Each device that relies on receiving the proper RF signals such as televisions, radios, radars, medical devices, and cell phones, requires some level of filtering. While all filters have the same basic job – remove unwanted or out-of-band signals – the specific job requirements of each filter vary depending on the RF architecture used and the needs of the final device.

Read More

Topics: 5G, RF and Microwave, Military and Aerospace

Achieve Excellent Performance in a Small Footprint with Low-Loss, High Q S and C Band Filters

Posted by Dave Thibado on Oct 28, 2020 8:00:00 AM

At any given time, there are a multitude of signals at a variety of frequencies streaming all around us. This means most RF devices require some level of filtering to attenuate or remove unwanted signals from the desired channel. Without a filter, receiver components can become saturated and unwanted signals can combine with desired signals to corrupt information.

Read More

Topics: RF and Microwave

Insights Into Precision Passive Devices

Knowles Precision Devices is a premier global source for Capacitors, RF Filters, EMI Filters, Resonators, non-magnetic components and advanced dielectric materials. An umbrella for the brands of Compex, DLI, Johanson MFG, Novacap, Syfer and Voltronics, Knowles Precision Devices serves a variety of markets including military, aerospace/avionics, medical equipment, implantable devices, EMI and connector filtering, oil exploration, instrumentation, industrial electronics, automotive, telecoms and data networks.

This Blog will provide insights into:

  • Filters for 5G and mmWave
  • Capacitors for High Voltage
  • Capacitors for High Reliability

and much more. Subscribe below to stay informed.

Subscribe Here!

Recent Posts