US2311435A - Duplex radio communication - Google Patents
Duplex radio communication Download PDFInfo
- Publication number
- US2311435A US2311435A US395928A US39592841A US2311435A US 2311435 A US2311435 A US 2311435A US 395928 A US395928 A US 395928A US 39592841 A US39592841 A US 39592841A US 2311435 A US2311435 A US 2311435A
- Authority
- US
- United States
- Prior art keywords
- stations
- station
- antenna
- duplex radio
- radio communication
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
- H01Q1/525—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas between emitting and receiving antennas
Definitions
- the output wave presents a slant or slope of an angle of 45 degrees or of 135 degrees with respect to the horizontal as shown in Figure 1, while Figure 2' shows the relationship between adjacent stations.
- S denotes a transmitter dipole connected to transmitter T and E a receiver dipole connected to receiver R.
- the transmitter and receiver dipoles are to be considered as lying mutually at right angles to one another in a single vertical plane; in this case, the plane of the drawing.
- a plurality of stations as shown in Figure 1 may be arranged along a line as shown in Figure 2;
- stations A, B, C are satellite stations with their antennas in parallel planes, and of receiving antennas S parallel with each other and, also, of transmitting antennas E parallel with each other.
- a master station M likewise, has these antennae, E and S, in a plane parallel to that of the satellite stations A, B and C but with the plane rotated through 180 degrees so that the transmitting dipole S is parallel to each of the receiving dipoles E at stations A, B and C and the receiving dipoles E at station M is parallel to each of the transmitting dipoles S at the stations A, B and C.
- the receiving antenna E is connected to a receiver R and the transmitting antenna S is connected to a transmitter T in the same way as shown in Figure 1.
- the master station M may simultaneously transmit to all of the satellite stations A, B and C and receive from each of the satellites in section. Also, the master station M may carry out duplex communication with any of the satellite stations A, B and C.
- any of the satellite stations will not be picked up by any of the other stations because their receiving antennae are at right angles to the transmitting antenna of the satellite station which is transmitting.
- station B for example, is to communicate directly with station A such communication may be carried out by station B rotating its antenna degrees about a vertical axis.
- antenna S of each of stations A and B is parallel to the antenna E of the other and each may transmit to the other and be received by the other station.
- reflectors P may be provided at each station to enhance the directive effect whereby the radiation of each station is unable to cause interference with communications being carried on between another pair of stations of the system.
- a duplex radio system comprising a plurality of stations greater than two, each of said stations having a transmitting antenna adapted to radiate energy polarized at an angle of 45 degrees with respect to the horizontal and a receiving antenna responsive to energy polarized at right angles to energy transmitted by said transmitting antenna, said antennae being arranged in parallel planes, the antennae of adjacent stations being identically arranged in said planes for communication to and from all of the stations of said system, the arrangement being such that by rotation of the antennae at one of said stations 180 degrees about a vertical axis through said plane duplex communication with an adjacent station may be established.
- a duplex radio communication system including at least three stations, wherein each of the stations of the system includes transmitting and receiving antennae, the antennae of all the said stations being arranged in parallel vertical planes, the transmitting antenna of each station being adapted to radiate only to energy polarized at an angle of 45 degrees with respect to the horizontal and the receiving antenna of each station being responsive only to energy polarized at right-angles to the energy transmitted by the transmitting antenna at the same station, the arrangement of said antennae and at all of said stations being identical in one position for communication to and from all of said stations, and the antennae at certain ones of said stations being reversible 180 degrees in said planes whereby any of said certain stations of said system may communicate with an adjacent station.
Description
Feb. 16, 1943.
E. GERHARD DUPLEX RADIO COMMUNICATION Filed May 31, 1941 RECEIVER TRANSMITTER Fig.2.
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INVENTOR ERNST Patented Feb. 16, 1943 antics DUPLEX RADIO COMlWUNICATION Application May 31, 1941, Serial No. 395,928 In Germany December 23, 1939 2 Claims.
It is known in the art to de-couple a transmitter antenna and a receiver antenna by causing the directions of polarization thereof to be perpendicular to each other. If, for instance, the transmitted wave which is sent out is vertically polarized while the incoming wave is horizontally polarized, then duplex or two-way operation on the same wavelength is possible. The arrangements known in the prior art have the drawback that two groups or sets of apparatus are necessary, namely, the one whose output wave is, for instance, vertically polarized and that whose output Wave is polarized at right angles thereto, in other words, horizontally polarized. Particularly Where a large number of such apparatus is employed, this condition is undesirable since there is no chance for any of these devices to communi cate with any other device.
Now, according to the invention arrangements are so made that the output wave presents a slant or slope of an angle of 45 degrees or of 135 degrees with respect to the horizontal as shown in Figure 1, while Figure 2' shows the relationship between adjacent stations.
Referring to Figure l, S denotes a transmitter dipole connected to transmitter T and E a receiver dipole connected to receiver R.
The transmitter and receiver dipoles, it will be noted, are to be considered as lying mutually at right angles to one another in a single vertical plane; in this case, the plane of the drawing. Now, a plurality of stations as shown in Figure 1 may be arranged along a line as shown in Figure 2; stations A, B, C are satellite stations with their antennas in parallel planes, and of receiving antennas S parallel with each other and, also, of transmitting antennas E parallel with each other. A master station M, likewise, has these antennae, E and S, in a plane parallel to that of the satellite stations A, B and C but with the plane rotated through 180 degrees so that the transmitting dipole S is parallel to each of the receiving dipoles E at stations A, B and C and the receiving dipoles E at station M is parallel to each of the transmitting dipoles S at the stations A, B and C. At each of the stations the receiving antenna E is connected to a receiver R and the transmitting antenna S is connected to a transmitter T in the same way as shown in Figure 1. Now the master station M may simultaneously transmit to all of the satellite stations A, B and C and receive from each of the satellites in section. Also, the master station M may carry out duplex communication with any of the satellite stations A, B and C. The
transmissions of any of the satellite stations will not be picked up by any of the other stations because their receiving antennae are at right angles to the transmitting antenna of the satellite station which is transmitting. However, if station B, for example, is to communicate directly with station A such communication may be carried out by station B rotating its antenna degrees about a vertical axis. Then antenna S of each of stations A and B is parallel to the antenna E of the other and each may transmit to the other and be received by the other station. If desired, reflectors P may be provided at each station to enhance the directive effect whereby the radiation of each station is unable to cause interference with communications being carried on between another pair of stations of the system.
I claim:
1. A duplex radio system comprising a plurality of stations greater than two, each of said stations having a transmitting antenna adapted to radiate energy polarized at an angle of 45 degrees with respect to the horizontal and a receiving antenna responsive to energy polarized at right angles to energy transmitted by said transmitting antenna, said antennae being arranged in parallel planes, the antennae of adjacent stations being identically arranged in said planes for communication to and from all of the stations of said system, the arrangement being such that by rotation of the antennae at one of said stations 180 degrees about a vertical axis through said plane duplex communication with an adjacent station may be established.
2. A duplex radio communication system, including at least three stations, wherein each of the stations of the system includes transmitting and receiving antennae, the antennae of all the said stations being arranged in parallel vertical planes, the transmitting antenna of each station being adapted to radiate only to energy polarized at an angle of 45 degrees with respect to the horizontal and the receiving antenna of each station being responsive only to energy polarized at right-angles to the energy transmitted by the transmitting antenna at the same station, the arrangement of said antennae and at all of said stations being identical in one position for communication to and from all of said stations, and the antennae at certain ones of said stations being reversible 180 degrees in said planes whereby any of said certain stations of said system may communicate with an adjacent station.
ERNST GERHARD.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2311435X | 1939-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2311435A true US2311435A (en) | 1943-02-16 |
Family
ID=7994488
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US395928A Expired - Lifetime US2311435A (en) | 1939-12-23 | 1941-05-31 | Duplex radio communication |
Country Status (1)
Country | Link |
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US (1) | US2311435A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2448017A (en) * | 1945-04-17 | 1948-08-31 | Standard Telephones Cables Ltd | Antenna system |
US2544677A (en) * | 1945-03-06 | 1951-03-13 | Rca Corp | Radio trail navigational system |
US2573914A (en) * | 1949-07-30 | 1951-11-06 | Rca Corp | Antenna system |
US2649539A (en) * | 1948-02-21 | 1953-08-18 | Bell Telephone Labor Inc | Microwave carrier telephone system |
US2883523A (en) * | 1955-09-07 | 1959-04-21 | Francis P Meserow | Wireless communication system |
US2885542A (en) * | 1955-09-16 | 1959-05-05 | Itt | Diversity communication receiving system |
US2892191A (en) * | 1955-04-29 | 1959-06-23 | Bell Telephone Labor Inc | Antenna system having a directionally variable radiation pattern |
US3069113A (en) * | 1959-04-10 | 1962-12-18 | Huntoon Robert De Witt | Antenna system for an ordnance missile |
-
1941
- 1941-05-31 US US395928A patent/US2311435A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2544677A (en) * | 1945-03-06 | 1951-03-13 | Rca Corp | Radio trail navigational system |
US2448017A (en) * | 1945-04-17 | 1948-08-31 | Standard Telephones Cables Ltd | Antenna system |
US2649539A (en) * | 1948-02-21 | 1953-08-18 | Bell Telephone Labor Inc | Microwave carrier telephone system |
US2573914A (en) * | 1949-07-30 | 1951-11-06 | Rca Corp | Antenna system |
US2892191A (en) * | 1955-04-29 | 1959-06-23 | Bell Telephone Labor Inc | Antenna system having a directionally variable radiation pattern |
US2883523A (en) * | 1955-09-07 | 1959-04-21 | Francis P Meserow | Wireless communication system |
US2885542A (en) * | 1955-09-16 | 1959-05-05 | Itt | Diversity communication receiving system |
US3069113A (en) * | 1959-04-10 | 1962-12-18 | Huntoon Robert De Witt | Antenna system for an ordnance missile |
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