Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
1999-02-03
2001-03-06
Maung, Nay (Department: 2744)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S302000, C455S327000, C455S328000, C333S250000
Reexamination Certificate
active
06198912
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the sector of the transmitting and receiving of microwave signals, and more precisely to a frequency converter for applications to millimetric radio waves.
In the range of the millimetric radio waves regarding frequencies starting from 30 GHz it is possible to realize very compact and miniaturized frequency converters, thanks also to the reduced dimensions of the cross sections of the rectangular waveguides interconnected to these.
This type of converters are generally realized in thin films, and the dielectric layers are put into metallic packages. The frequency conversion is carried out by diodes. There is a problem regarding the forwarding of the radiofrequency signal from the waveguide towards the diodes and vice versa, and the problem of carrying out a transition between the metallic waveguide and the microstrip circuit connected to the diodes.
BACKGROUND ART
A known solution to this problem consists in the introduction into the guide of an end of a small cylindric conductor the other end of which is welded to the microstrip. The above-mentioned conductor operates as an antenna in the guide and transfers the there existing radiofrequency signal to the microstrip, or vice versa.
SUMMARY OF THE INVENTION
The present invention concerns a frequency converter realized in thin film with a simple structure and it makes it possible to connect the waveguide of the radiofrequency signal directly to a cavity containing the diodes avoiding the use of additional transition means put between the guide, the diodes and the part in microstrip of the circuit. In the first analysis it is possible to say that the mixer diodes also carry out the transition from the guide to the microstrip or the opposite transition. In order to allow such aims the object of the present invention is a microwave frequency converter as described in the main claim.
REFERENCES:
patent: 3584306 (1971-06-01), Spacek
patent: 3638126 (1972-01-01), Spacek
patent: 3882396 (1975-05-01), Schneider
patent: 4229828 (1980-10-01), Braird et al.
patent: 4276655 (1981-06-01), Kraemer et al.
patent: 4365195 (1982-12-01), Stegens
patent: 4412354 (1983-10-01), Hu
patent: 4480336 (1984-10-01), Wong et al.
patent: 4789840 (1988-12-01), Albin
patent: 4955079 (1990-09-01), Connerney et al.
patent: 5953644 (1999-09-01), Kool et al.
patent: A1 36-32002 (1988-04-01), None
patent: A1 36-37827 (1988-05-01), None
patent: A1 0-186295 (1986-07-01), None
Schneider and Snell, “Harmonically Pumped Stripline Down-Converter”, IEEE Transactions on Microwave Theory and Techniques, vol. mtt-23, No. 3, Mar. 1975, pp. 271-275.
Maung Nay
Persino Raymond
Siemens Information and Communication Networks S.p.A.
LandOfFree
Frequency converter for the application on millimetric radio... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Frequency converter for the application on millimetric radio..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Frequency converter for the application on millimetric radio... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2464753