Slot Radiators Phased Array Antennas 300 MHz To 25 GHz
Brand Name:HAITIAN
Certification:ISO
Model Number:Slot radiators slot antennas phased array antennas
Minimum Order Quantity:1set
Place of Origin:China
material:aluminum copper
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Hefei Anhui China
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Industrial room3, south of intersection Penglai road and tangkou road ,Economic and Technological Development Zone, hefei city, Anhui province
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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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