On this web site you can find instructions on designing and construction of EH Antennas. I have instruction on building a 6’ 80M antenna and there is also an 20M antenna that I built. All made with inexpensive materials. These antennas can be built for around $10 - $20 depending on what you have in your junk box and garage. You can build one in the afternoon and have it on the air tonight. They allow hams in restricted areas to get on the air. I made a 20M and put it on one of my friends roof vent (vent for plumbing). EH antenna have allowed some to get into playing with antennas.