Folded dipole antenna
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A folded dipole antenna is a dipole antenna folded back, connected to each other at both ends. This form of a loop, shown in Figure 1. please Click here to get our dipole antenna
The folded dipole input impedance Z_A is:
The folded dipole antenna resonance and radiation, as well as an odd integer multiples of half wavelength (0.5, 1.5, ...) This is a real antenna, the Federal Reserve as shown in Figure 1 in the center. Input impedance of the folded dipole is higher than a regular dipole. This will be shown in the next section.
Can be folded dipole antenna resonant in even multiples of half wavelength (1.0, 2.0, ...), which can offset folded dipole feed Figure 1 (near the top or bottom edge of the folded dipole). Half-wavelength folded dipole Folded dipole antenna of half-wavelength antenna impedance can be found from the above formula for the ZA. ZA = 4 * the ZD. Resonance, which is about a half-wave dipole antenna impedance of 70 ohms. Therefore, the folded half-wave dipole antenna input impedance is 280 ohms. Duplex transmission line characteristic impedance is 300 ohm folded dipole connected, usually use this type of line. This will produce the best power transfer from the transmission line antenna. Therefore, the half-wavelength folded dipole antenna is usually used for larger antenna impedance (greater than 100 ohms). Half-wavelength folded dipole radiation pattern, the same form of half-wavelength dipole. please Click here to get our dipole antenna |
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