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Do you have the time and budget to develop a circularly polarized antenna in an anechoic chamber?

Continuous transmission is one of the main objectives when designing an antenna for portable devices. Transmitting and receiving antennas’ polarization match is crucial to minimize the transmission losses. Circularly polarized antennas are becoming more popular in the wireless industry as they offer more flexibility in the angle between transmitting and receiving antennas to achieve this polarization match. Axial ratio is the key to achieve this polarization match.

In order to achieve circular polarization at the desired frequency, the transmitter and the receiver should have the same axial ratio. This requirement can be accomplished by evaluating different shapes and dimensions of patches like square, rectangular, circular, triangular and sizes or by inserting different shapes and the dimensions of perturbation elements or by embedding different dimensions of slots or slits in the patch.

Substrate, the layer between the patch and the ground, is another item to consider when designing a circularly polarized antenna. The antenna performance towards the desired circular polarization specs can be enhanced by testing various substrate materials and specifications. Substrate thickness can be modified to ensure that the surface waves are suppressed for better antenna efficiency.

Feeding techniques is another consideration in designing circularly polarized antennas. Single feed or dual feed can be evaluated to get the desired input impedance and radiation pattern to achieve the intended circular polarization.

There are so many alternatives to consider when designing a circularly polarized antenna. And every time one of these options is implemented, the prototype needs to be tested to ensure that desired circular polarization specs are achieved. Testing a prototype in an anechoic chamber throughout the design and development stage can prove to be excruciatingly long and overwhelmingly expensive.

Determine proper alignment of antennas for maximum signal strength and characterize CP antennas in less than a second!

With CP Analysis option, RFxpert calculates Right-Hand Circular Polarization (RHCP), Left-Hand Circular Polarization (LHCP) and graphs Axial Ratio (AR) patterns in sub-second.

Having access to both the left-hand and right-hand patterns can be used to identify the orientation of the circular polarization as well. This feature will allow designers of circularly polarized antenna to characterize the effectiveness of their design in seconds.

RFxpert presents test results in four hemispherical views (Combined, RHCP, LHCP, and Axial Ratio), four Bisection views (Combined, RHCP, LHCP, and Axial Ratio), and two Bisection Cut views combining the Combined, RHCP and LHCP patterns. These views can be displayed in either Polar or Cartesian modes.

Below are the sample test results of a 2.4 GHz RHCP antenna

cp_antenna_test

RFxpert is the only compact bench-top scanner that can evaluate CP antennas as you prototype them in your own lab environment in real-time. RFxpert gives you the ability to expedite your development cycle and reduce your time to market. To learn more about how to design and characterize CP antennas better click the “Demo Video” button at the bottom of the page.

Why RFxpert Is Right For You

You want to avoid the delays and set-up needed for far-field measurements in a chamber.

RFxpert not only require low CAPEX and zero OPEX, they also deliver significant ROI advantages.

You can execute real-time analysis of your design, test multiple design iterations and optimize complex designs on your lab-bench in seconds at each stage of the design process.

Key Benefits

Test results in seconds
Easy to use
Compact and tabletop
Significant time-to-market acceleration
Dramatic increase in production
Substantial cost reduction

Read More

Are you under time-to-market pressure because of the countless number of lengthy measurements in inaccessible anechoic chambers?

Tired of losing valuable project time waiting in line to test your designs in expensive anechoic chambers?

Do you want to test your design and performance quickly to accelerate project completion and delivery?

Are you under budget pressures?

Why did your product fail the compliance test in an anechoic chamber? Why didn’t you see this coming?

With RFxpert, in seconds and a fraction of an anechoic chamber cost you can easily:

  • Analyze your embedded antenna and wireless device designs
  • Prototype / test new designs, components, and forms
  • Iteratively test and optimize embedded antenna designs
  • Perform highly repeatable and rapid over-the-air wireless device measurements
  • Verify final product performance in real-time
  • Gain immediate insight into the root causes of performance issues by analyzing the near-field results

…all for a fraction of the cost of an anechoic chamber.

  •   How does RFxpert work?

    rfxpert-how-does-it-workRFxpert measures the magnetic field (H-Field) in two orthogonal directions using H-field probes and projects this data to the far-field using the planar aperture distribution to angular spectrum transformation or plane wave spectrum (PWS) transformation.

    A second custom algorithm then adjusts the far-field projection to eliminate the predictable coupling effects of the measurement array of probes. Probe response compensation is also taken into consideration in this algorithm.

    EMSCAN meticulously developed this custom algorithm through comprehensive and rigorous R&D efforts to get the most accurate test results.

Companies Who Trust RFxpert Products
What Our Customers Are Saying
“I prefer to use the RFxpert for my antenna design projects instead of simulation software. In a couple of hours, I can model a real antenna out of copper and test it with the RFxpert in the antenna’s intended operating environment. I then use the proven design, based on the RFxpert analysis, to prepare a CAD drawing and send it off to manufacturing for prototyping.”
Jorge I. Ortiz
RF Network & Antenna Engineer, Independent Consultant at Mueller Systems Ocala, Florida Area
“We're impressed with the accuracy of the RFX scanner compared to our external lab measurements for TRP.”
Jeremy Monroe
MoJoose Inc
“We wanted to extend the distance between the hand-held transmitter and the aerial device. Initially we thought that we had to add an additional power amplifier stage. The RFxpert showed us that the real problem was something else: the coax was radiating as much as the antenna. By using better coax and a different coupling method from the final power amplifier stage to the antenna, we were able to transfer more power to the antenna. We managed this significant increase by almost zero cost to the design.”
Director of Engineering
Consumer Electronics Manufacturer
“Designers now evaluate designs in real-time vs. waiting at the back of the queue with $100M+ projects in front”
RF Design Engineer
Leading Military Subcontractor

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