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Make a high-gain, horizontally polarized omni or unidirectional antenna that looks cool. Unlike wideband antennas such as the Biquad [Hack #88], slotted waveguides are resonant antennas and have a relatively narrow operating frequency range. The designs described in this hack have an adequate bandwidth for any
My current favorite uses 32 slots to get 15dBi of gain, radiated in a uniformly omnidirectional manner. The large number of slots makes it easier to dissipate the energy from the waveguide. Like with the 16 slot unidirectional, two sets of "wings (one set at each slot surface) are required to get equal radiation of energy over a
Jun 21, 2016
Nov 20, 2012
In addition, through using printed waveguide transmission line technology, a slotted waveguide array antenna may be configured to radiate millimeter electromagnetic may require the application of additional materials, such as metals and foil stacks, in order to create waveguide channels within the slotted waveguides.
Building the 8+8 Slotted Waveguide. We used 100mm x 50mm rectangular hollow box section aluminium with 3mm thick walls. This gives us an internal size of 94mm x 44mm. We chose to build the antenna for 2.442GHz, or channel 7, as this is close to the center of the 13 channels available to us (US designs use channel
In the case where one radiation slot is provided in a position offset from the center of the H plane of the waveguide, no symmetrical configuration is not formed and actually no An existing horizontally omnidirectional antenna structured such as explained above is widely used as an antenna apparatus for TV and radar.
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