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Analog multiple beam feed systems and methods

A technology for simulating beams and beams, applied in diversity/multi-antenna systems, transmission systems, radio transmission systems, etc., can solve problems such as increasing MBF size, weight DC power and cost, and complex topology

Active Publication Date: 2018-12-21
RAYTHEON CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, both the MSM scheme and the PAF scheme require a large total number of analog parts and a complex topology, which will increase the size, weight, DC power and cost of these MBFs

Method used

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  • Analog multiple beam feed systems and methods
  • Analog multiple beam feed systems and methods
  • Analog multiple beam feed systems and methods

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Experimental program
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Embodiment Construction

[0025] now refer to figure 1 , a receive embodiment of a switchless analog beamformer multi-beam feed (MBF) 2 comprising a plurality of antenna elements 10a-10n, the output of each antenna element being coupled to a number n of a plurality of low noise amplifiers (LNA) 14a -14n per input. The output of each LNA is coupled to each of the m inputs of the switchless analog beamformer circuit 16 . The switchless analog beamformer circuit 16 includes a plurality of encoder elements 18a-18n at each beamformer input, an n:1 RF combiner 22, an optional single RF to IF downconverter, a 1:t divider 32. A plurality of decoder elements 36a-36t, a plurality of weighting circuits 40a-40t, and a plurality of beamformers 44a-z.

[0026] exist figure 1 In the exemplary embodiment of the present invention, each LNA antenna element 14a-14n is coupled to a corresponding one of the encoder elements 18a-18n. The output of each encoder element 18a - 18n is coupled to an input of combiner 22 . T...

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Abstract

The present disclosure is directed towards an analog beamformer multiple beam feed (MBF). The analog beamformer MBF comprises a plurality of encoder elements to receive radiofrequency (RF) signals andgenerate coded analog signals. The RF signals may be coded using code division multiple access (CDMA) codes. The analog beamformer MBF further comprises a combiner to combine the coded analog signalsreceived from the plurality of encoder elements and a divider to receive the combined coded analog signals and generate a plurality of coded analog outputs. The analog beamformer MBF further comprises a plurality of decoder elements to receive the plurality of coded analog outputs and generate decoded analog signals. In some embodiments, the RF signals may be decoded using CDMA codes. The analogbeamformer MBF further comprises a plurality of beamformer elements configured to generate beam outputs corresponding to the decoded analog signals.

Description

Background technique [0001] It is known in the art that there is a class of microwave antennas known as multi-beam antennas (MBA). Receive MBAs use reflectors and lenses to provide large antenna apertures together with Multiple Beam Feeds (MBFs) to provide a relatively low component count with electronically steered multi-beam outputs. MBF generates this electronic manipulation by electronically changing the interconnection between multiple radiating elements and multiple beams that do not cover the entire antenna aperture. The total number of elements of an MBA MBF is much lower than that of an equal-aperture direct-radiating electronically steered antenna (ESA), which has elements covering the entire antenna aperture. [0002] There are two types of MBFs, the first type has an analog beamformer and the second type has a digital beamformer. As far as the first type is concerned, the circuitry of MBFs with analog beamformers can be very complex. Analog MBFs can use complex ...

Claims

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Application Information

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IPC IPC(8): H04B7/06H04B7/08
CPCH04B7/0691H04B7/0874H04B7/0617H04B2201/70726H04B1/707
Inventor V·S·赖因哈特
Owner RAYTHEON CO