AsantiDesign
Asanti Design, LLC
RF Design Antennas
Certifications
Why Choose Asanti Design?
Dustin's extensive expertise in RF design will guide your IoT RF design, ensuring optimal wireless performance and a device fully prepared for certifications such as PTCRB, AT&T, FCC, ISED, and RED. At Asanti, we approach every project with an ownership mindset, taking pride in delivering cutting-edge IoT solutions.
​
​
Services We Provide
​
-
Altium Schematic Design and PCB Layout
-
RF Design Reviews
-
Antenna Design
-
Antenna Integration
-
Impedance Matching
-
Certification Planning
-
Certification Testing
FREQUENTLY ASKED QUESTIONS
What makes an antenna radiate well?
​
Antennas are the opposite of a controlled-wave (i.e. transmission line). To make a bad antenna, make a good transmission line. To make a good antenna, make a bad transmission line. For good radiation characteristics we want to spread the currents from the ground plane instead of tightly couple them. Separate the antenna from the ground plane and other metal objects. Ensure the antenna and ground plane are a reasonable size compared to a wavelength to maximize radiation efficiency and bandwidth. And lastly, ensure the antenna is 50ohms when integrated in the device. Tuning and/or impedance matching is always required.
Why is my device failing PTCRB/CTIA testing?
​
Radiated spurious emissions (RSE) - Emissions fail due to poor RF to power supply isolation, too much RF pickup of non-linear devices or poor filtering, shielding or antenna matching.
​
Over the air testing (OTA) - Total Radiated Power (TRP) will fail due to poor transmission line design, poor antenna matching or simply a bad radiator (antenna). Total Isotropic Sensitivity (TIS) will fail due to desense of the receiver, which is caused by noisy analog/digital circuits near the antenna.
​
​
How can I improve my wireless performance?
​
Wireless performance starts with the antenna. The better the antenna, the more range and reliability one can expect from any wireless system. Secondly, more transmit power is an easy way to get more wireless range as long as the link isn't asymmetrical. Often, the output power can be increased without battery life or certification issues (not true with cellular). Lastly, better receiver sensitivity will ensure good downlink performance and the radios behave as expected from the Friis Equation. By ensuring a low EMI/EMC PCBA design, we lower the noise floor of the device. Often, this amounts to 6-12dB of improvement and a doubling or 4x of the reliable wireless range of the system.
