Device for transmitting a signal with the aid of waveguides

Abstract

A device for transmitting a signal with the aid of waveguides in rotating systems. The device includes at least one transmitting waveguide and at least one receiving waveguide. The at least one receiving waveguide and the at least one transmitting waveguide being divided into multiple radially distributed segments. The radially distributed segments of the at least one receiving waveguide each include a tap. An adder for adding the signals obtained with the aid of the taps of the radially distributed segments of the at least one receiving waveguide is also provided.

Claims

1. A device for transmitting a signal using waveguides in a rotating system, the device comprising: at least one transmitting waveguide; at least one receiving waveguide, each of the at least one receiving waveguide and the at least one transmitting waveguide being divided into multiple radially distributed segments, wherein the radially distributed segments of the at least one receiving waveguide each include a tap; and an adder configured to add together signals obtained using the taps of the radially distributed segments of the at least one receiving waveguide; wherein a length of each of the segments of the at least one receiving waveguide is greater than a minimal relevant wavelength λ.sub.min=cΠτ occurring in the signal to be transmitted.

2. The device as recited in claim 1, further comprising: a reconstruction component configured to reconstruct a signal obtained by the addition by the adder.

3. The device as recited in claim 2, wherein the reconstruction component is an integrator or a comparator with hysteresis.

4. A device for transmitting a signal using waveguides in a rotating system, the device comprising: at least one transmitting waveguide; at least one receiving waveguide, each of the at least one receiving waveguide and the at least one transmitting waveguide being divided into multiple radially distributed segments, wherein the radially distributed segments of the at least one receiving waveguide each include a tap; an adder configured to add together signals obtained using the taps of the radially distributed segments of the at least one receiving waveguide; and a reconstruction component configured to reconstruct a signal obtained by the addition by the adder; wherein the reconstruction component is an integrator or a comparator with hysteresis.

5. The device as recited in claim 4, wherein the taps of the radially distributed segments of the at least one receiving waveguide are situated opposite one another.

6. The device as recited in claim 4, furthermore comprising: a component configured to couple the signal to be transmitted having positive polarity into a first segment of the at least one transmitting waveguide, and to couple the signal to be transmitted having negative polarity into a second segment of the at least one transmitting waveguide.

7. The device as recited in claim 6, the component is a comparator, which has a non-inverting output and an inverting output.

8. The device as recited in claim 4, wherein a respective resistor is provided for terminating a free end of each of the radially distributed segments of the at least one transmitting waveguide and/or each of the radially distributed segments of the at least one receiving waveguide.

9. The device as recited in claim 4, wherein the adder is a resistive coupler.

10. The device as recited in claim 4, wherein the radially distributed segments of the at least one transmitting waveguide and/or the radially distributed segments of the at least one receiving waveguide, are half rings.

11. The device as recited in claim 4, wherein the radially distributed segments of the at least one transmitting waveguide and/or the radially distributed segments of the at least one receiving waveguide, are shortened receiving rings having mutually opposing decoupling points.

12. The device as recited in claim 4, wherein the at least one transmitting waveguide is provided at a rotor, and the at least one receiving waveguide is provided at a stator.

13. The device as recited in claim 4, further comprising: a component configured to divide the signal to be transmitted for a first transmitting waveguide and for a second transmitting waveguide.

14. The device as recited in claim 13, furthermore comprising: a first receiving waveguide and a second receiving waveguide, the first receiving waveguide provided for detecting the signal transmitted using the first transmitting waveguide, and the second receiving waveguide being provided for detecting the signal transmitted with using the second transmitting waveguide.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Exemplary embodiments of the present invention are described in greater detail based on the figures and the description below.

(2) FIG. 1 shows a device according to the present invention according to a first exemplary embodiment.

(3) FIG. 2 shows a device according to the present invention in a symmetrical design according to a second exemplary embodiment.

DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS

(4) FIG. 1 shows a device according to the present invention in the form of a waveguide rotary transmitter D according to a first exemplary embodiment, which is largely immune to unevenness and tilting. For this purpose, receiving waveguide WL.sub.E1 is divided into multiple, radially distributed segments WL.sub.E1a, WL.sub.E1b, whose received signals are added up with the aid of an adder ADD.

(5) If, for example, the receiving amplitude of a segment WL.sub.E1a is reduced due to a tilting or an unevenness, the receiving amplitude of the opposite segment WL.sub.E1b is high. By adding up the signals of all segments WL.sub.E1a, WL.sub.E1b of receiving waveguide WL.sub.E1, the amplitude of the result is rendered independent of the angular position, which makes a cumbersome readjustment of the signal amplitude at the receiver E unnecessary.

(6) In the present example, corresponding to FIG. 1, segments WL.sub.S1a, WL.sub.S1b of transmitting waveguide WL.sub.S1 and segments WL.sub.E1a, WL.sub.E1b of receiving waveguide WL.sub.E1 are implemented as half rings. The signals which are coupled into one side of transmitting half rings WL.sub.S1a, WL.sub.S1b are inverted with respect to one another. Termination resistors R are situated at the other side of transmitting half rings WL.sub.S1a, WL.sub.S1b.

(7) Taps A.sub.1, A.sub.2 of segments WL.sub.E1a, WL.sub.E1b of receiving waveguide WL.sub.E1 are situated at opposite positions, the free end being terminated with a respective resistor R. In this way, segments WL.sub.E1a, WL.sub.E1b of receiving waveguide WL.sub.E1 are terminated reflection-free and may be considerably longer than the minimal wavelength λ.sub.min occurring in the signal. As a result of this design, the surface area is maximized via which the electromagnetic wave of transmitting wave guide WL.sub.S1 may be overcoupled onto that of receiving waveguide WL.sub.E1. This results in a high coupling efficiency, which renders a pre- or post-amplification of the signal unnecessary. At the same time, this system functions even at high data rates of typically 1 Gbit/s.

(8) As is further shown in FIG. 1, a comparator COMP.sub.1, which increases the edge steepness of the rectangular signal, is situated behind signal source SQ. Non-inverting output 0° couples a rectangular signal having positive polarity into left segment WL.sub.S1a of transmitting waveguide WL.sub.S1, and inverting output 180° couples the corresponding signal having negative polarity into right segment WL.sub.S1b of transmitting waveguide WL.sub.S1. Both signals propagate along segments WL.sub.S1a, WL.sub.S1b of waveguide WL.sub.S1 up to termination resistors R and, during the propagation time, couple over into segments WL.sub.E1a, WL.sub.E1b of receiving waveguide WL.sub.E1.

(9) Tap A.sub.1 at the left receiving waveguide is situated at the end of the propagation section of the input signal. An inverted, high-pass filtered signal is received. At the locations at which steep signal edges were present at the input signal, the output signal thus has narrow pulses.

(10) Tap A.sub.2 at right segment WL.sub.E1b of receiving waveguide WL.sub.E1, in contrast, is situated at the start of the propagation section of the input signal. The output signal is made up of pulses which occur at the locations of signal edges of the input signal; the polarity of the signal, however, remains unchanged. The pulse width is greater than that of left segment WL.sub.E1a of receiving waveguide WL.sub.E1 and corresponds to the sum of the propagation times of the input signal along right segment WL.sub.S1b of transmitting waveguide WL.sub.S1 and of right segment WL.sub.E1b of receiving waveguide WL.sub.E1.

(11) During a twisting of the transmitter with respect to the receiver by 180°, the signals coupled out of segments WL.sub.E1a, WL.sub.E1b of receiving waveguide WL.sub.E1 are interchanged. A twisting dissimilar from 180°, in contrast, yields an overlapping of the long pulse and of the short pulse at each of segments WL.sub.E1a, WL.sub.E1b of receiving waveguide WL.sub.E1. The two received signals are added up, for example, via a resistive 50/50 coupler as means ADD for addition. The result is a signal which has a high stability, regardless of the angle of the twisting of the transmitter with respect to the receiver. The pulse-shaped signal is reconstructed into the original rectangular signal based on a means REC for signal reconstruction, for example in the form of an integrator or a comparator with hysteresis.

(12) FIG. 2 shows a device according to the present invention in a symmetrical design according to a second exemplary embodiment, configured as a waveguide rotary transmitter D. The input signal originating from signal source SQ is divided among inverting inputs 180° and non-inverting inputs 0° of two comparators COMP.sub.2, COMP.sub.3.

(13) Comparator COMP.sub.3, for example, couples the signal into the left waveguide pair, made up of segments WL.sub.S1a, WL.sub.S2a of transmitting waveguides WL.sub.S1 and WL.sub.S2. Comparator COMP.sub.2, in contrast, according to the exemplary embodiment couples the signal into the right waveguide pair, made up of segments WL.sub.S1b, WL.sub.S2b of transmitting waveguides WL.sub.S1 and WL.sub.S2. A different wiring of the comparator outputs is also possible. As an alternative, according to the present invention the use of a fan-out buffer may also be provided.

(14) On the receiver side, the two signals received at outer segments WL.sub.E2a, WL.sub.E2b of the waveguides are added up by a means ADD for addition. Furthermore, similarly, the two signals received at inner segments WL.sub.E1a, WL.sub.E1b of the waveguides are also added up by a means ADD for addition. The results of the two additions form a symmetrical signal, from which the original rectangular data stream is restored by a means REC for signal reconstruction, in the present example in the form of a comparator with hysteresis REC.