The inverted-L HF antenna provides a compact solution and offers superb TX and RX characteristics . It’s half the size of a dipole and allows for an optimal installation due to it’s convenient configuration. Perfect for a typical home and garden arrangement.
The following data are for the far field radiation patterns and 3D color views of an End Fed Half Wave Inverted-L antenna with a long, straight radiator at 40 feet and feed point straight down near ground. Red color indicates the stronger radiation on 3D views. The direction of radiation is the Blue trace on the polar graphs. Horizontal is 90°.
1/20/2018 · An “Inverted-L” antenna is basically a wire antenna, typically ¼ to ½ wavelength long on the band it is designed for. The Inverted-L antenna is a common antenna for the 160 meter and 80 meter amateur bands, where typical ¼ wave verticals are impractically tall for most amateurs.
The Inverted L is a 1/4-wave Marconi, fed against ground or a counterpoise such as radials. The antenna displays a low feed impedance, which allow you to feed it directly with 50-ohm coax cable. The vertical section should be as high as possible, with the remainder of the antenna run horizontally to a support, such as a tree or a mast.
12/24/2016 · End/Base-Fed Inverted-L, 90 ft version, Elevation and Azimuth Radiation Plots Below are presented the results of EZNec modeling of a 90 ft long End/Base-Fed Inverted-L, 45 ft high and 45 ft across. Elevation patterns and Azimuth patterns at the peak of low angle radiation are plotted for all ham bands 160 Meters through 6 Meters.
End Fed Half Wave / Inverted L / Half Wave Dipole. The popular End Fed Half Wave is all things to all men, but this article compares an End Fed Half Wave, Inverted L , and Half Wave Dipole with some common parameters: frequency: 7.1MHz flat top length: 20m Height above ‘average’ ground (?=0.005, ?r=13): 10m lossless balun / matching device.
The 45 ft long End Fed is up about 20 feet and mostly horizontal. The Inverted L is up 40 feet and about 55 feet long with 3 long ground radials. On 10-20m the End Fed consistently out performs the Inverted L by 2 to 4 S units. The Inverted L will stay up for 40 and 80m use.
6/22/2017 · IOW, the 1/2 wave antenna needs to be an Inverted-L 70 ft or so tall in order to match the performance of a 23 ft tall or so Inverted-L of 45 ft total length. This is why we generally use 1/4-ish wave antennas against a good ground plane on the lower frequencies.
4. Can be fed from the opposite end with virtually the same patterns and gain. More options for deployment under a picnic shelter r oof. 5. Since 1:1 match is achieved at the feed point in every installation, no tuner is needed so the antenna can be remoted without mismatch loss when using a longer piece of coax. 6. Power handling?, The inverted L is actually my favorite way to deploy the end fed half wave because it is a great performer ! It’s alittle harder to put up, but it does a much better job than the inverted V. SLOPER CONFIGURATION Figure 3 is the end fed half wave antenna deployed as a sloper, and I usually only use this antenna on 20 meters and up.
