Huh, neat! Tips for adding a Yagi antenna to wifi routers and equipment.
It’s easy to make a small Yagi for a wireless router even if it lacks an antenna connector. The photo shows how I added two parasitic elements to the sleeve dipole of my Netgear WGR614.
With the AO 8.51 Antenna Optimizer I modeled a three-element Yagi at 2412, 2437, and 2462 MHz. These are center frequencies of the lowest, middle, and highest U.S. Wi-Fi channels. To model the sleeve dipole, I optimized the length of an isolated driven element for minimum SWR. Then I added the parasitics and optimized their lengths and positions for maximum forward gain, including mismatch loss for a 50Ω source impedance. All optimizations weighted the three frequencies equally. Finally, I rounded the dimensions. Below are calculated performance figures at the channel centers using 30 analysis segments per halfwave. Forward gain includes mismatch and conductor losses.
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, or even use Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for MakeCode, CircuitPython, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.