Radio system for long-range high-speed wireless communication
Devices and systems, and methods of using them, for point-to-point transmission/communication of high bandwidth signals. Radio devices and systems may include a pair of reflectors (e.g., parabolic reflectors) that are adjacent to each other and configured so that one of the reflectors is dedicated for sending/transmitting information, and the adjacent reflector is dedicated for receiving information. Both reflectors may be in a fixed configuration relative to each other so that they are aligned to send/receive in parallel. In many variations the two reflectors are formed of a single housing, so that the parallel alignment is fixed, and reflectors cannot lose alignment. The device/systems may be configured to allow switching between duplexing modes. These devices/systems may be configured as wide bandwidth zero intermediate frequency radios including alignment modules for automatic alignment of in-phase and quadrature components of transmitted signals.
1. A radio device for point-to-point transmission of high bandwidth signals, the device comprising:
a solid housing comprising a first parabolic reflector and a second parabolic reflector wherein the first and second reflectors are aimed and aligned directionally parallel with each other so that the first reflector and the second reflector are seen as a single device by a paired partner during point-to-point transmission;
a transmitter feed coupled to the center of the first parabolic reflector;
a receiver feed coupled to the center of the second parabolic reflector; and
a printed circuit board (PCB) comprising both a first transmitter connected to the transmitter feed and a first receiver connected to the receiver feed,
further wherein an outer diameter of the first parabolic reflector cuts into an outer diameter of the second parabolic reflector so that a distance between the transmitter feed and the receiver feed is less than a sum of the diameters of the two reflectors.
2. The device of claim 1 , wherein the PCB comprises a second transmitter connected to the transmitter feed and a second receiver connected to the receiver feed.
3. The device of claim 1 , wherein the housing comprises a rigid housing.
4. The device of claim 1 , wherein the first parabolic reflector and the second parabolic reflector are separated by an isolation choke boundary layer.
5. The device of claim 1 , wherein the first parabolic reflector and the second parabolic reflector have a focal length to diameter ratio (f l /d) is less than 0.25.
6. The device of claim 1 , further comprising a barrier between the first parabolic reflector and the second parabolic reflector that comprises a very low edge taper to reduce edge diffraction and improve isolation between the first and second parabolic reflectors.
7. The device of claim 1 , wherein the first parabolic reflector is smaller than the second parabolic reflector.
8. The device of claim 1 , further comprising a radome cover over the first and second parabolic reflectors configured to add additional stiffness to the housing.
9. The device of claim 1 , wherein the housing comprises ribs configured to stiffen the housing and keep the first and second reflectors directionally parallel.
10. The device of claim 1 , wherein the first parabolic reflector is a dedicated transmitting antenna configured to transmit but not to receive; further wherein the second parabolic reflector is a dedicated receiving antenna configured to receive but not to transmit.
11. A radio device for point-to-point transmission of high bandwidth signals, the device comprising:
a solid housing comprising a first parabolic reflector and a second parabolic reflector wherein the first and second reflectors are aimed and aligned directionally parallel with each other so that the first reflector and the second reflector are seen as a single device by a paired partner during point-to-point transmission, further wherein a distance between a dedicated transmitter feed and a dedicated receiver feed is less than a sum of the diameters of the two reflectors;
the transmitter feed coupled to the center of the first parabolic reflector;
the receiver feed coupled to the center of the second parabolic reflector; and
a printed circuit board (PCB) comprising both a first transmitter connected to the transmitter feed and a first receiver connected to the receiver feed.