Antenna systems for multiple frequency bands
First Claim
1. An antenna system for transmitting and/or receiving radio frequency signals in multiple frequency bands, the antenna system comprising:
- a horn antenna configured to transmit and/or receive radio frequency signals in multiple frequency bands that are spread over more than an octave bandwidth with at least a 2.44-to-1 bandwidth ratio, the horn antenna comprising;
a throat disposed at a first end of the horn antenna;
an aperture disposed distantly from the throat at a second end of the horn antenna; and
an interior surface disposed in the horn antenna between the first end and the second end of the horn antenna, the interior surface comprising a plurality of slope discontinuities; and
a feed network coupled to the horn antenna, the feed network comprising;
a first waveguide section configured to provide a matching network, the first waveguide section configured to transmit and/or receive the radio frequency signals in the multiple frequency bands;
a first junction configured to transmit and/or receive the radio frequency signals in first selected one or more frequency bands of the multiple frequency bands and not all of the multiple frequency bands;
one or more first filters configured to pass the radio frequency signals in the first selected one or more frequency bands of the multiple frequency bands and configured to reject the radio frequency signals in frequency bands not in the first selected one or more frequency bands of the multiple frequency bands; and
a first step-down waveguide section coupled to the first waveguide section, the first step-down waveguide section configured to transmit and/or receive the radio frequency signals in second selected one or more frequency bands of the multiple frequency bands and configured to reject the radio frequency signals in the first selected one or more frequency bands of the multiple frequency bands.
1 Assignment
0 Petitions
Accused Products
Abstract
An antenna system for transmitting and/or receiving radio frequency (RF) signals in multiple frequency bands includes a horn antenna and a feed network. The horn antenna may transmit and/or receive RF signals in multiple frequency bands that are spread over more than an octave bandwidth with at least a 2.44-to-1 bandwidth ratio. The horn antenna includes a throat, an aperture, and an interior surface. The feed network includes a first waveguide section, a first junction, one or more first filters, and a first step-down waveguide section. The first waveguide section can provide a matching network and transmit and/or receive the RF signals in the multiple frequency bands. The first junction can transmit and/or receive the RF signals in first selected band(s) of the multiple frequency bands. The first step-down waveguide section may transmit and/or receive the RF signals in second selected band(s) of the multiple frequency bands.
-
Citations
21 Claims
-
1. An antenna system for transmitting and/or receiving radio frequency signals in multiple frequency bands, the antenna system comprising:
-
a horn antenna configured to transmit and/or receive radio frequency signals in multiple frequency bands that are spread over more than an octave bandwidth with at least a 2.44-to-1 bandwidth ratio, the horn antenna comprising; a throat disposed at a first end of the horn antenna; an aperture disposed distantly from the throat at a second end of the horn antenna; and an interior surface disposed in the horn antenna between the first end and the second end of the horn antenna, the interior surface comprising a plurality of slope discontinuities; and a feed network coupled to the horn antenna, the feed network comprising; a first waveguide section configured to provide a matching network, the first waveguide section configured to transmit and/or receive the radio frequency signals in the multiple frequency bands; a first junction configured to transmit and/or receive the radio frequency signals in first selected one or more frequency bands of the multiple frequency bands and not all of the multiple frequency bands; one or more first filters configured to pass the radio frequency signals in the first selected one or more frequency bands of the multiple frequency bands and configured to reject the radio frequency signals in frequency bands not in the first selected one or more frequency bands of the multiple frequency bands; and a first step-down waveguide section coupled to the first waveguide section, the first step-down waveguide section configured to transmit and/or receive the radio frequency signals in second selected one or more frequency bands of the multiple frequency bands and configured to reject the radio frequency signals in the first selected one or more frequency bands of the multiple frequency bands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An antenna system for transmitting and/or receiving radio frequency signals in multiple frequency bands, the antenna system comprising:
-
a horn antenna configured to transmit and/or receive radio frequency signals in multiple frequency bands, the horn antenna comprising; a throat disposed at a first end of the horn antenna; an aperture disposed distantly from the throat at a second end of the horn antenna; and an interior surface disposed in the horn antenna between the first end and the second end of the horn antenna, the interior surface comprising a plurality of slope discontinuities, the interior surface increasing in diameter from the first end of the horn antenna to the second end of the horn antenna, the interior surface having the smallest diameter at the throat, the interior surface having the largest diameter at the aperture, the diameter of the interior surface at the aperture being less than 12 times the wavelength of the highest frequency of the multiple frequency bands, the diameter of the interior surface at the aperture being greater than 1.7 times the wavelength of the lowest frequency of the multiple frequency bands; a feed network coupled to the horn antenna, the feed network comprising; a first waveguide section configured to provide a matching network, the first waveguide section configured to transmit and/or receive the radio frequency signals in the multiple frequency bands; a first junction configured to transmit and/or receive the radio frequency signals in first selected one or more frequency bands of the multiple frequency bands and not all of the multiple frequency bands; one or more first filters configured to pass the radio frequency signals in the first selected one or more frequency bands of the multiple frequency bands and configured to reject the radio frequency signals in frequency bands not within the first selected one or more frequency bands of the multiple frequency bands; and a first step-down waveguide section configured to transmit and/or receive the radio frequency signals in second selected one or more frequency bands of the multiple frequency bands and not in the first selected one or more frequency bands of the multiple frequency bands. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
-
Specification