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That understanding takes away the yamaha fz6 pdf service manual 'black magic' that used to be cs1 6 cheats hacks associated with design of these antenna systems.
Fidelity is much better at modelling waveguide structures than my favorite simulator, NEC2, but it is quite an expensive package, with a long learning curve.
Weather and your Antenna Use nylon, aluminum or stainless steel screws and fasteners, as suits your preference, not normal (corrosive) ones.
And don't forget my BiQuad design.It doesn't matter which direction the first one is cut, but they must alternate.I built my 8 slot prototype using only hand tools.Slotted Waveguide Antennas Unlike wideband antennas like the biquad, slotted waveguides are resonant antennas, and have a relatively narrow operating frequency range.It allows us to propagate signals to a number of smaller antennas (slots).Since it was relatively easy for me to "build" structure after structure in the electromagnetic simulator, an understanding of the inter-dependance of each canon lens won manual focus parameter came quite quickly.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 full 360 degrees.Looking straight on at the front of the guide you can see right through both the front and back slots.Any resemblance between the above and my own views is non-deterministic.Either you dont bother about it, and just hose the antenna clean every year or so, or you use, and regularly replace, the protective tape.Additionally, unlike vertical colinear antennas, the slotted waveguide transmits its energy using horizontal polarization, the best type for distance transmission.
You can see the wave travelling up the waveguide from the probe.
The first has 8 slots and is about 30 inches long."Please machine this slot.417mm in length" In the days before computing power was free, engineers spent their whole careers deriving formulae to try and describe the operation and design of Slotted Waveguides.And is plotted for a frequency range from 2410 to 2520 in 10MHz steps, without any tuning screw tweaks.The major attraction of a slotted waveguide design is its simplicity.More important is the ability of the tuning screws to cancel some of the reactance of the antenna, and reduce the SWR.Simulation makes it easier to see subtle interdependencies that would be very difficult to measure.The gain for the 16 slot Unidirectional is 15dBi-17dBi, verified on my test range, across the whole band.Highly Directional Slotted Waveguide Antennas Sometimes it is useful to have a highly directional antenna.Mount the N connector in the center of the widest side,.5mm from one end (the 'base of the airspace in the waveguide and offset 10 mm from the centre line of the face, in the direction as the offset of the first slot.Wireless networking systems using the 802.11b standard operate in the.4GHz ISM band.I have simulated that 4 one half inch diameter holes in each vertex of the far end plug do not affect performance in any measurable way.Do not change this dimension, it is two electrical wavelengths.The slot width for the 16 slotter stays the same at 15mm, and the slot length should be 58mm.Microwave technology is pretty esoteric, and it used to be reserved for the "spooks" designing electronic warfare systems, radars, and the like.



Transmission on an immediately adjacent channel, (say, channels 5 or 7 normally not permissible because of interference, is now possible.
Simulation can give you much more information about the performance of a microwave antenna than you get from building.
They will affect performance.


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