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Achromatic waveplate is similar to Zero-order waveplate except that the two plates are made from different materials, such as crystal quartz and magnesium fluoride. Since the dispersion of the birefringence can be different for the two materials, it is possible to specify the retardation values at a wavelength range. Hence, the retardation of the resulting waveplate can be made to low sensitivity to wavelength change. Based on the contact methods of two plates, we classify the achromatic waveplate to two types: Airspaced and Cemented.
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An achromatic waveplate is similar to a zero-order waveplate, but it is made of two different materials to reduce sensitivity to wavelength change.
This antenna addresses infrastructure deployments with dependable and cost effective designs. It has 40 degree vertical beamwidth and a precision milled feed assembly outfitted with a durable fiberglass radome for the array.
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The RF interface is a N female connector. The OD4-700 was designed to withstand the harshest outdoor environment, and massive wind/ice load beyond 125 MPH (160 kph) with 1/2” radial ice.
It is available in black or white. Pole mount hardware is standard. There is an optional flat wall mount bracket OD-WMK.
The OD4-700 antenna was designed for the new 700 MHz nationwide spectrum. It covers frequencies from 694 to 806 MHz with 4 dBi gain.