초록 ▼

A multiband antenna mounting and feedline coupling arrangement includes a first transmission line segment secured in a mounting device for the antenna for coupling energy to and from the antenna. A second transmission line segment, extending, e.g., to grounded high band equipment, provides high band

A multiband antenna mounting and feedline coupling arrangement includes a first transmission line segment secured in a mounting device for the antenna for coupling energy to and from the antenna. A second transmission line segment, extending, e.g., to grounded high band equipment, provides high band signal coupling with the first line and includes a direct current blocking capacitor in series in the ground return path of that second line segment, the capacitor having such a low impedance to high band energy that it presents negligible impedance to such energy. A third transmission line segment provides low band signal coupling with the first line by way of a part of the ground return path of the first line. A high band quarter wave, in the high band, filter stub transmission line is connected between the signal and ground return paths of the third transmission line adjacent to the point of coupling thereof to the first line. Several different implementations of the capacitor and transmission line segment combination are illustrated.

대표청구항 ▼

A multiband antenna feedline coupling arrangement comprising: a first transmission line segment having first and second conductors for providing energy transmission for a plurality of bands including a low band signal and a high band signal, said high band signal appearing on the first and second co

A multiband antenna feedline coupling arrangement comprising: a first transmission line segment having first and second conductors for providing energy transmission for a plurality of bands including a low band signal and a high band signal, said high band signal appearing on the first and second conductors and the low band signal appearing on said second conductor, a second transmission line segment for providing energy transmission for the high band signal having a signal path and a ground return path, the signal path of the second transmission line segment being connected to the first conductor of the first transmission line segment, a capacitor connected in series between the second conductor of the first transmission line segment and the ground return path of said second transmission line segment for presenting a much lower impedance to the frequencies of the high band signal than to the frequencies of the low band signal, a third transmission line segment having a signal path and a ground return path for providing energy transmission for the frequencies of the low band signal including frequencies lower than frequencies in the high band signal, the third transmission line segment having a signal path and a ground return path and presenting a much lower impedance to frequencies of the low band signal than is presented by said capacitor, and means for connecting the third transmission line segment signal path to the second conductor of the first transmission line segment.