APPARATUS AND METHODS OF ACCESSING ALL CHANNELS OF A SUPERHETERODYNE RECEIVER SIMULTANEOUSLY

• US 20150011170A1
• Filed: 04/04/2014
• Published: 01/08/2015
• Est. Priority Date: 07/03/2013
• Status: Active Grant

• Current Assignee: the united states of america as represented by the secretary of the navy
• Original Assignee: the united states of america as represented by the secretary of the navy
• Inventors: Christianson, Andrew, Whitaker, George, Maas, Jeff
• Granted Patent: US 9,742,441 B2
• Time in Patent Office: Days
• US Class Current: 455/131
• CPC Class Codes: H04B 1/0053 with common antenna for more than one band
• CPC Class Codes: H04B 1/28 the receiver comprising at least one semiconductor device having three or more electrodes
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks

Abstract

An apparatus and method associated with exploiting a characteristic in super-heterodyne receivers such that a modulated signal will be received on all channels simultaneously regardless of the channel selected on the receiver.

Claims

1. An energy output apparatus adapted bypassing channel selection for a superheterodyne communication system comprising:

a first and second sections, wherein said first section adapted to output a plurality of one or more frequencies that are continuous wave un-modulated signals, said second section adapted to output a signal with a frequency is modulated with a tone, a recording, or live audio wherein one of said first or second sections is adapted to produce an omnidirectional output signal and the other section is adapted to produce a directional output signal, wherein said first and said second sections are adapted to transmit all frequencies are within or very near corner frequencies of a pass band of a superheterodyne receiver of interest which passes within both said omnidirectional or said directional signal output, wherein said all frequencies are within or very near corner frequencies of said pass band such that negligible or manageable attenuation occurs;

wherein said plurality of continuous wave signal'"'"'s frequencies and the one modulated frequency combine in the superheterodyne receiver'"'"'s mixer as sums and differences of all possible combinations resulting an intermediate frequency product which is passed through the pass band of said superheterodyne receiver;

wherein said all frequencies are selected such that one combination of sums and differences is equal to the intermediate frequency of the superheterodyne receiver;

wherein nonlinear components in said superheterodyne receivers perform frequency conversion on said all frequencies.

2. An energy output system as in claim 1, wherein said energy output apparatus is adapted to transmit both the continuous wave signals and the modulated signal from one or more antennas to generate coverage sufficient to orient on said superheterodyne receiver upon activation.

3. An energy output system as in claim 1, wherein any said superheterodyne receiver with the intermediate frequency and the pass band that is in a range of the continuous wave receiver'"'"'s signal frequencies and the modulated frequency will output the modulated audio on all channels regardless where the radio tuner is set.

4. The energy output system as in claim 1, wherein the modulation is other than AM modulation such as frequency, phase or any of the other digital or analog modulation schemes such as phase shift key or asymmetric phase shift key.

5. A method of communicating with an entity having an unknown selection of radio communication channel setting, comprising:

detecting an unauthorized aircraft comprising a superheterodyne communication architecture system comprising a band pass filter and intermediate frequency filter;

determining the aircraft location and bearing;

selecting at least a first and second frequency or channel to respectively broad cast an omnidirectional signal and a directional signal, wherein said first and second frequency or channel is selected based on one or more design parameters of said superheterodyne receiver architecture system , said one or more design parameters comprising frequencies which said superheterodyne receiver architecture system will not reject using said band pass filter or another filter, said first and second frequency or channels are also determined based on an intermediate frequency at said band pass filter frequency of said superheterodyne receiver architecture system, wherein said intermediate frequency determines a separation between a frequency separation between said first and second frequency;

orienting said directional signal towards said unauthorized aircraft and maintaining said aircraft within said directional signal beampath during a period to transmit a message to said unauthorized aircraft; and

modulating and transmitting one of said directional signal or said omnidirectional signal with said message for said period to transmit said message.

6. A method as in claim 5, wherein one of said omnidirectional signal or direction signal comprises of multiple frequencies.

7. A method as in claim 5, further comprising selecting additional frequencies or channels to generate additional frequency products within a one or more band pass filters of the superheterodyne communication architecture systems for matching different respective intermediate frequencies.

8. A method of communicating with an entity having an unknown selection of radio communication settings

communicating with an unauthorized aircraft comprising a superheterodyne communication architecture system comprising a band pass filter and intermediate frequency filter;

generating a library of sets of said first and second frequencies or channels associated with different said superheterodyne communication architecture systems, each of said first and second frequencies or channels operable for respectively broadcasting an omnidirectional signal and a directional signal, wherein each set of said first and second frequencies or channels is selected based on one or more design parameters of a particular one of said different said superheterodyne communication architecture systems, said one or more design parameters comprising frequencies which said superheterodyne communication architecture system will not reject using said band pass filter or another filter, said sets of said first and second frequency or channels are also determined based on an intermediate frequency at each said band pass filter of each said different said superheterodyne communication architecture systems, wherein each said intermediate frequency determines a separation between said first and second frequency;

selecting one of said sets of said first and second frequencies;

orienting said directional signal towards said unauthorized aircraft and maintaining said aircraft within said directional signal beampath during a period to transmit a message to said unauthorized aircraft; and

modulating and transmitting one of said directional signal or said omnidirectional signal with said message for said period to transmit said message using said one of said sets of said first and second frequencies.

9. A method as in claim 8, wherein one of said omnidirectional signal or direction signal comprises of multiple frequencies.

10. A method as in claim 8, further comprising selecting additional frequencies or channels to generate additional frequency products within a one or more band pass filters of the superheterodyne communication architecture systems for matching different respective intermediate frequencies.