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Slot Radiators Phased Array Antennas 300 MHz To 25 GHz

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Slot Radiators Phased Array Antennas 300 MHz To 25 GHz

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Brand Name :	HAITIAN
Model Number :	Slot radiators slot antennas phased array antennas
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Slot Radiators Phased Array Antennas 300 MHz To 25 GHz

Slot radiators slot antennas phased array antennas

Slot radiators or slot antennas are antennas that are used in the frequency range from about 300 MHz to 25 GHz. They are often used in navigation radar usually as an array fed by a waveguide. But also older large phased array antennas used the principle because the slot radiators are a very inexpensive way for frequency scanning arrays. Slot antennas are an about λ/2 elongated slot, cut in a conductive plate (Consider an infinite conducting sheet), and excited in the center. This slot behaves according to Babinet's principle as resonant radiator. Jacques Babinet (1794 - 1872) was a French physicist and mathematician, formulated the theorem that similar diffraction patterns are produced by two complementary screens (Babinet's principle). This principle relates the radiated fields and impedance of an aperture or slot antenna to that of the field of a dipole antenna. The polarization of a slot antenna is linear. The fields of the slot antenna are almost the same as the dipole antenna, but the field’s components are interchanged: a vertical slot has got an horizontal electric field; and the vertical dipole has got a vertical electrical field.

The impedance of the slot antenna (Zs) is related to the impedance of its complementary dipole antenna (Zd) by the relation:

The band width of a narrow rectangular slot is equal to that of the related dipole, and is equal to half the bandwidth of a cylindrical dipole with a diameter equal to the slot width. Figure 2 shows slot antennas different from the rectangular shape that increasing the bandwidth of the slot antenna.

Slot Radiators Phased Array Antennas 300 MHz To 25 GHz

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Slot Radiators Phased Array Antennas 300 MHz To 25 GHz

Slot Radiators Phased Array Antennas 300 MHz To 25 GHz

Slot Radiators Phased Array Antennas 300 MHz To 25 GHz

Slot Radiators Phased Array Antennas

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Slot Radiators Phased Array Antennas 300 MHz To 25 GHz