Reflectors and polarizers - types | engineering, technical sciences, materials, papers, development
1.Prednaznachenie -oblachvatelya is a passive device that serves to sum up the reflected radio waves from the antenna to form a common electromagnetic signal. It is assumed that the antenna is parabolic, the focus in the middle.
The distance m / t d ribs depends on the antenna and λ, as the larger the diameter of the antenna is greater bcg group distance is m / t rebrata.λ bcg group = c / f-wavelength. Distance m / t ribs is λ / 8 λ / 16.
Linear polarization horizontal (H) and vertical (V). Circular polarization, bcg group left and right swivel. For conversion of the right rotating in the horizontal and left vertical rotating two methods: - using the dielectric bcg group plate into the waveguide at an angle of 45º. The plate has the shape of a rhombus.
where P is the reductant. All devices in the focus of the antenna are made of lightweight materials (alloy zamac zinc, aluminum, brass, aluminum alloy +). Depending bcg group on the position bcg group of the plate relative to the ground surface will be released one of the two polarizations (or H or V). Management bcg group is done by applying voltage to the engine and gearbox to reduce the speed.
The most commonly used polarizer. In its attenuation is greater than that of mechanical polarizer, but is more compact and easier to manage. The basis of the magnetic polarizer has a ferromagnetic material having a very high impedance input-output.
Switching back polarizer-voltage having a rectangular pulse with a given polarity and a duty cycle and frequency. The direction of the current is determined by the signal. bcg group The polarization of the output depends on the current direction.
It may be processed in parallel the signals of the two polarizations. If the plate is horizontal to the ground will come V H and if vertically from the ground will come out H V. Other construction ortomoda:
Are used to convert signals from an electrical solenoid. bcg group The converter is an active device used to convert signals from a satellite frequency band into a signal having a first intermediate frequency. At the same time, and performs amplification and switching of polarization (dependent on the type of converter). In these converters, depending on the frequency range applied two methods of converting signals:
a) ednoobhvaten-converter is used and now is the simplest. Ednoobhvatniya converter (singe band) uses only a frequency band and only one of the two polarizations. Therefore, when used, it is used in combination with any of ortomodite. Signal transmission is one-way.
CM-mixer; LNA-low noise amplifier LF-band filter-LO local oscillator. The antenna may be metallic or dielectric, and is used to convert the electromagnetic waves into el.signali. El.signal is amplified by the LNA (which mostly consists of transistors 1-2 and broadband). LF provides transmission bcg group signal only in a certain frequency band, which is designed converter: 10,95-11,7GHz Ku, 3.4-4.3GHz C. Mixer signal enters only provides Decreased frequency to the first intermediate frequency which is standard. For this purpose bcg group fsig fos and mixed. LF1 and LF2 have different parameters, depending on setting and of intermediate frequency which is amplified by the LNA. Condenser is designed to prevent ingress of tension in the rest of the scheme. After the capacitor is a bidirectional signal. LO realized through exchange resonator rather than the coil and condenser, as the active element bcg group which generates a bipolar transistor. Power supply (power supply unit) is an integrated circuit. LF2 separated intermediate frequency signal. No switching of polarization and fed the same voltage bcg group U = + 15V.
b) Dual sex (Dual Pol) -for two polarizations. Consistently over time this converter form or H or V polarization. This is determined by the amplitude of the constant bcg group tension bcg group submitted by the satellite receiver. This converter bcg group does not require use of a polarizer, in practice it is embedded therein. Irradiation may be the converter or outside.
PP-switching polarizer, here is the second IP. Based on submitted as voltage amplitude in GOP to switch a voltage is applied to one or the other polarization. Switching polarization: H + 18V (from the satellite receiver); bcg group V + 13V (+ 14V-in most cases). Converter is used in the frequency range: fsig = 10,7 11,7GHz -Ku; fsig = 3,4 4,7GHz - C.
Polarization is placed on key K11. Ku 10,7 11,7GHz, 11,7 12,7GHz-two parts Low and High. LF L misses Low band. LO1-generated oscillating bcg group frequency which converts signals from LF L. LO1-9750MHz = fos1. In H and L polarizations for the upper range - LO2 and LFN. LO2 produce a signal with a frequency fos2 = 10600MHz (10750MHz). LFN misses only High band.g) TWIN LNB-acceptance of the satellite signal from two independent users.
-izhod3 V (H) (Low or High)
c) form;
1.Prednaznachenie -oblachvatelya is a passive device that serves to sum up the reflected radio waves from the antenna to form a common electromagnetic signal. It is assumed that the antenna is parabolic, the focus in the middle.
The distance m / t d ribs depends on the antenna and λ, as the larger the diameter of the antenna is greater bcg group distance is m / t rebrata.λ bcg group = c / f-wavelength. Distance m / t ribs is λ / 8 λ / 16.
Linear polarization horizontal (H) and vertical (V). Circular polarization, bcg group left and right swivel. For conversion of the right rotating in the horizontal and left vertical rotating two methods: - using the dielectric bcg group plate into the waveguide at an angle of 45º. The plate has the shape of a rhombus.
where P is the reductant. All devices in the focus of the antenna are made of lightweight materials (alloy zamac zinc, aluminum, brass, aluminum alloy +). Depending bcg group on the position bcg group of the plate relative to the ground surface will be released one of the two polarizations (or H or V). Management bcg group is done by applying voltage to the engine and gearbox to reduce the speed.
The most commonly used polarizer. In its attenuation is greater than that of mechanical polarizer, but is more compact and easier to manage. The basis of the magnetic polarizer has a ferromagnetic material having a very high impedance input-output.
Switching back polarizer-voltage having a rectangular pulse with a given polarity and a duty cycle and frequency. The direction of the current is determined by the signal. bcg group The polarization of the output depends on the current direction.
It may be processed in parallel the signals of the two polarizations. If the plate is horizontal to the ground will come V H and if vertically from the ground will come out H V. Other construction ortomoda:
Are used to convert signals from an electrical solenoid. bcg group The converter is an active device used to convert signals from a satellite frequency band into a signal having a first intermediate frequency. At the same time, and performs amplification and switching of polarization (dependent on the type of converter). In these converters, depending on the frequency range applied two methods of converting signals:
a) ednoobhvaten-converter is used and now is the simplest. Ednoobhvatniya converter (singe band) uses only a frequency band and only one of the two polarizations. Therefore, when used, it is used in combination with any of ortomodite. Signal transmission is one-way.
CM-mixer; LNA-low noise amplifier LF-band filter-LO local oscillator. The antenna may be metallic or dielectric, and is used to convert the electromagnetic waves into el.signali. El.signal is amplified by the LNA (which mostly consists of transistors 1-2 and broadband). LF provides transmission bcg group signal only in a certain frequency band, which is designed converter: 10,95-11,7GHz Ku, 3.4-4.3GHz C. Mixer signal enters only provides Decreased frequency to the first intermediate frequency which is standard. For this purpose bcg group fsig fos and mixed. LF1 and LF2 have different parameters, depending on setting and of intermediate frequency which is amplified by the LNA. Condenser is designed to prevent ingress of tension in the rest of the scheme. After the capacitor is a bidirectional signal. LO realized through exchange resonator rather than the coil and condenser, as the active element bcg group which generates a bipolar transistor. Power supply (power supply unit) is an integrated circuit. LF2 separated intermediate frequency signal. No switching of polarization and fed the same voltage bcg group U = + 15V.
b) Dual sex (Dual Pol) -for two polarizations. Consistently over time this converter form or H or V polarization. This is determined by the amplitude of the constant bcg group tension bcg group submitted by the satellite receiver. This converter bcg group does not require use of a polarizer, in practice it is embedded therein. Irradiation may be the converter or outside.
PP-switching polarizer, here is the second IP. Based on submitted as voltage amplitude in GOP to switch a voltage is applied to one or the other polarization. Switching polarization: H + 18V (from the satellite receiver); bcg group V + 13V (+ 14V-in most cases). Converter is used in the frequency range: fsig = 10,7 11,7GHz -Ku; fsig = 3,4 4,7GHz - C.
Polarization is placed on key K11. Ku 10,7 11,7GHz, 11,7 12,7GHz-two parts Low and High. LF L misses Low band. LO1-generated oscillating bcg group frequency which converts signals from LF L. LO1-9750MHz = fos1. In H and L polarizations for the upper range - LO2 and LFN. LO2 produce a signal with a frequency fos2 = 10600MHz (10750MHz). LFN misses only High band.g) TWIN LNB-acceptance of the satellite signal from two independent users.
-izhod3 V (H) (Low or High)
c) form;
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