63 results about "Low-noise block downconverter" patented technology

Disclosed herein is an intelligent low-noise block down-converter (LNB) which is implemented to, only when an LNB ID contained therein is the same as an ID of a satellite receiver connected therewith, provide a down-converted signal (IF signal) to the satellite receiver, thereby making it possible to more securely prevent an ID card of the satellite receiver and/or a pay broadcast program from being duplicated.

The invention relates to a star finder and a method for finding a star by using the star finder. The star finder comprises a feeder module, a beacon receiver, a GPS (global positioning system) module, a master control module and an output module, wherein the feeder module is used for providing a working voltage for an LNB (low noise block downconverter) at a satellite antenna end and transmitting a satellite beacon signal processed by the LNB; the beacon receiver is connected with the feeder module and used for receiving and processing the satellite beacon signal, and outputting an electric level signal corresponding to the satellite beacon signal; the GPS module is used for determining longitude and latitude of a satellite antenna at the current working position; the master control module is respectively connected with the beacon receiver and the GPS module, stored with satellite parameters and used for calculating a satellite aiming parameter of the satellite antenna according to the parameter of the current satellite to be aimed as well as the longitude and the latitude of the satellite antenna; and the output module is connected with the master control module and used for displaying the satellite aiming parameter and the electric level signal. By means of the star finder, all the communication satellites can be tracked; the star finder and the star finding method are provided for rapidly aiming the antenna to the satellite; and the demand of emergency communication is met.

A system of satellite signal down conversion and reception comprises a low noise block down converter and a plurality of receivers. The low noise block down converter simultaneously and periodically sends a reference timing command to the plurality of receivers. Each of the plurality of receivers calibrates its timing based on the reference timing command to generate a plurality of data frames. Each of the data frames includes a plurality of time slots, and a time slot is designated to transmit data between the receiver and the low noise block down converter. Furthermore, each of the plurality of receivers uses a different time slot.

A first set of screws secures a Cassegrain-configuration microwave antenna's primary reflector to its low-noise block down-converter without additionally securing that reflector or the low-noise block down-converter to the antenna's feed tube, which a second set of screws separately secures to the low-noise block down-converter.

In a low noise block downconverter converting a right-hand (or horizontally) polarized wave signal and a left-hand (or vertically) polarized wave signal to intermediate frequency signals, one of two filters for removal of interference waves from the intermediate frequency signals on the right-hand (or horizontally) polarized wave side and on the left-hand (or vertically) polarized wave side is formed of a plurality of stages of parallel resonant trap circuits having capacitors and inductors connected in parallel, respectively, which exhibit attenuation characteristic that is wideband and steep and allows great attenuation in the reject band. Thus, it is possible to provide a low noise block downconverter employing an LPF that achieves attenuation characteristic being wideband and steep and allowing great attenuation in the reject band with the least possible number of inductor components that would otherwise increase the cost.

A primary radiator for a parabolic antenna includes a cylindrical horn antenna body widened towards an end opening in a cone shape, a horn cap provided at the end opening of the horn antenna body, and a plurality of cylindrical protruding portions formed of a dielectric. The protruding portions are provided on the inner wall surface of the horn cap, concentric with a central axis of the horn antenna body, and concentrically arranged with each other, and the height of an inner one is determined to be higher than an outer one. According to such a configuration, a primary radiator for a parabolic antenna configured to favorably suppress the VSWR up to a bandwidth of 1050 MHz can be provided.

A switch block 1 includes: N inputs; M outputs; N amplification sections each of which amplifies one of each pair of 2N input signals which are generated by dividing N input signals supplied to the N inputs in two; N bandwidth conversion sections each of which subjects, to frequency conversion, the other one of each pair of 2N input signals; and a 2N×M switch section which outputs the 2N output signals, which are supplied from the N amplification sections and the N bandwidth conversion sections, to either: one of the M outputs; or none of the M outputs. With this arrangement, it is possible to provide a signal recombination circuit which can reduce the leakage of the input signals.

Various embodiments implement waveguides for signal distribution or signal filtering in satellite receivers. According to some embodiments, a low noise block downconverter (LNB) is implemented using waveguides configured for signal distribution, band pass filtering, low pass filtering, high pass filtering, or band stop filtering. For some embodiments, the waveguides may be formed by the LNB chassis and the ground plane of a printed circuit board mounted to the LNB chassis.

An optical low-noise block down-converter for a satellite television system is disclosed. The optical low-noise block down-converter includes a first down-conversion module coupled to a satellite antenna of the satellite television system for converting a vertically polarized signal received by the satellite antenna into a first intermediate frequency signal, a second down-conversion module coupled to the satellite antenna for converting a horizontally polarized signal received by the satellite antenna into a second intermediate frequency signal, and a third down-conversion module having a first input terminal coupled between the satellite antenna and a first down-converter of the first down-conversion module and a second input terminal coupled between the satellite antenna and a second down-converter of the second down-conversion module for draining out part of the vertically polarized signal and the horizontally polarized signal to combine and convert into a legacy electrical signal.

A low-noise block downconverter (LNB) is disclosed. The low-noise block downconverter comprises a first input module, for outputting a first intermediate frequency (IF) signal after receiving a first polarization signal via a first input end; a second input module, for outputting a second IF signal after receiving a second polarization signal via a second input end; a first output module, coupled to the first input module, for amplifying the first IF signal, to output a first user signal to a first user; and a second output module, coupled to the second input module, for amplifying the second IF signal, to output a second user signal to a second user.

The invention discloses an optical low-noise block downconverter, multi-dwelling unit equipment and a related satellite television system. The optical low-noise block downconverter comprises a first downconversion circuit, a second downconversion circuit, an oscillator, a first light emitter and a second light emitter, wherein the first downconversion circuit is used for performing downconversion and filtering processing on a first polarized signal input into the optical low-noise block downconverter to output a first intermediate frequency signal; the second downconversion circuit is used for performing the downconversion and filtering processing on a second polarized signal input into the optical low-noise block downconverter to output a second intermediate frequency signal; frequency bands of the first and second intermediate frequency signals are the same; the oscillator is coupled to the first and second downconversion circuits, and is used for generating an oscillation signal and outputting the oscillation signal to the first and second downconversion circuits; the first light emitter is coupled to the first downconversion circuit, and is used for converting the first intermediate frequency signal into a first optical signal; and the second light emitter is coupled to the second downconversion circuit, and is used for converting the second intermediate frequency signal into a second optical signal. The optical low-noise block downconverter, the multi-dwelling unit equipment and the related satellite television system reduce the cost.

An LNB downconverter comprising: two LNBs configured to receive their respective satellite signals: the first and second LNB being configured to output, four IF signals of different polarization and frequency range to a respective first and second Cross-bar Switch (CBS); wherein the first and second CBS, are configured to accept four RF inputs, and routing them, to any of four outputs, as configured by a Controller: wherein outputs of CBSs are connected to respective Satellite Channel Routers (SCRs) configured by the Controller to shift the frequency of their input signals to fixed intermediate frequencies; wherein outputs of SCRs are connected to respective Band Pass Filters (BPFs) whereas the fixed intermediate frequencies of SCRs are different and wherein the band passed by each BPF is non-overlapping; an Adder adding the signals on different frequencies, output by each BPF, to form a single output signal comprising data from both satellite signals.