| 摘要 |
An antenna combination in which a dipole antenna (30) is arranged immediately next to the longest elements (8 max, 10 max) of a log-periodic antenna (2), and is connected to the end of the double line (4, 6) located nearest to it via a symmetrical line (20), whose characteristic impedance deviates by not more than +/-50% from the characteristic impedance of the double line (4, 6), and is preferably at least approximately equal to this characteristic impedance, and whose length is at least a quarter of the longest wavelength of the higher frequency band, and is preferably at least approximately equal to this wavelength. <IMAGE> |
