This interesting test subject by HexandFlex is a large PCB log periodic spiral antenna (not an Archimedes spiral). Its design goal was to be circularly polarized so that it would be polarization insensitive and large enough to function down to 400 MHz. The designer’s write-up of the design flow is detailed in this series of […]
Example 12: Raspberry Pi Model 3B+ Antenna Evaluation
This antenna example is a common and popular option for most IoT devices operating in the 2.45 GHz “WiFi” ISM band. It is a PCB antenna designed by Proant AB and replaces the dielectric SMT chip antenna previously used the “Pi’s”. The design is a planar resonant cavity using two sets of SMT capacitors to […]
Example 13: Radar Modules
Low Cost Microwave Radar Modules For 3, 10, and 24 GHz This example page showcases 3D EIRP radiation patterns for three popular consumer/hobbyist radar modules. All three are normally used for proximity sensing and intruder detection. The study of these similarly sized transmitters at 3, 10, and 24 GHz highlights the ability of antennas to […]
Example 14: UWB Spiral Antenna
This example page showcases our circularly polarized antenna testing with swept frequency 3D patterns and a 4D gain vs frequency animation video. The antenna was purchased on eBay for $7.49 and shipped directly from China. The basic specifications were simply listed as 3 to 6.5 GHz with a gain of 3.5 dBi circularly polarized. The […]
Example 15: Quad Ridge Dual Polarized Vivaldi Horn
This interesting eBay find is a Teflon PCB dual polarized Vivaldi pair. It was specified in its listing as 698 to 6000 MHz for mobile phone testing. With dimensions of 100x100mm, we suspected it was too small to work at 700 MHz, but the Teflon PCB material hinted at microwave performance. We tested this antenna […]
Example 1: Ethertronics Octa-Band
This antenna test service focuses on a popular ultrawideband embedded cellular antenna. It covers the 700, 750, 850, 900, 1800, 1900, and 2600 MHz bands. We tested it on Ethertronics’ own “demo board”, which is a 140x50mm ground plane PCB with SMT matching components. We chose 3D patterns with a frequency range of 650 to 2700 MHz […]
Example 2: Polar Plots of PCB LPDAs
Two Inexpensive PCB Antennas Descriptions Our antenna test service evaluated two PCB antennas designed by Kent Britain WA5VJB. They are both Log Periodic Dipole Array (LPDA) antennas designed for the following ranges: Antenna “2A” Operating Range 400 – 1000 MHz Evaluated 300 – 1300 MHz (every 10 MHz, 101 frequencies) 2D polar cuts in the E and H […]
This example page showcases our circularly polarized antenna testing with swept frequency 3D patterns and a 4D gain vs frequency animation video. The antenna was purchased on eBay for $7.49 and shipped directly from China. The basic specifications were simply listed as 3 to 6.5 GHz with a gain of 3.5 dBi circularly polarized. The […]
Example 15: Quad Ridge Dual Polarized Vivaldi Horn
This interesting eBay find is a Teflon PCB dual polarized Vivaldi pair. It was specified in its listing as 698 to 6000 MHz for mobile phone testing. With dimensions of 100x100mm, we suspected it was too small to work at 700 MHz, but the Teflon PCB material hinted at microwave performance. We tested this antenna […]
Low Cost Microwave Radar Modules For 3, 10, and 24 GHz This example page showcases 3D EIRP radiation patterns for three popular consumer/hobbyist radar modules. All three are normally used for proximity sensing and intruder detection. The study of these similarly sized transmitters at 3, 10, and 24 GHz highlights the ability of antennas to […]
Example 14: UWB Spiral Antenna
This example page showcases our circularly polarized antenna testing with swept frequency 3D patterns and a 4D gain vs frequency animation video. The antenna was purchased on eBay for $7.49 and shipped directly from China. The basic specifications were simply listed as 3 to 6.5 GHz with a gain of 3.5 dBi circularly polarized. The […]
Example 15: Quad Ridge Dual Polarized Vivaldi Horn
This interesting eBay find is a Teflon PCB dual polarized Vivaldi pair. It was specified in its listing as 698 to 6000 MHz for mobile phone testing. With dimensions of 100x100mm, we suspected it was too small to work at 700 MHz, but the Teflon PCB material hinted at microwave performance. We tested this antenna […]
Example 15: Quad Ridge Dual Polarized Vivaldi Horn
This interesting eBay find is a Teflon PCB dual polarized Vivaldi pair. It was specified in its listing as 698 to 6000 MHz for mobile phone testing. With dimensions of 100x100mm, we suspected it was too small to work at 700 MHz, but the Teflon PCB material hinted at microwave performance. We tested this antenna […]
Example 1: Ethertronics Octa-Band
This antenna test service focuses on a popular ultrawideband embedded cellular antenna. It covers the 700, 750, 850, 900, 1800, 1900, and 2600 MHz bands. We tested it on Ethertronics’ own “demo board”, which is a 140x50mm ground plane PCB with SMT matching components. We chose 3D patterns with a frequency range of 650 to 2700 MHz […]
Example 2: Polar Plots of PCB LPDAs
Two Inexpensive PCB Antennas Descriptions Our antenna test service evaluated two PCB antennas designed by Kent Britain WA5VJB. They are both Log Periodic Dipole Array (LPDA) antennas designed for the following ranges: Antenna “2A” Operating Range 400 – 1000 MHz Evaluated 300 – 1300 MHz (every 10 MHz, 101 frequencies) 2D polar cuts in the E and H […]
