# US 2014/0152452 A1 · Friendly Fire Hunting Safety Sensor

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- Number: US 2014/0152452 A1
- Document ID: US20140152452A1
- Status: Published application
- Kind: A1
- Application number: 13/705,333
- Filed: 2012-12-05
- Published: 2014-06-05
- Earliest claimed: 2012-12-05
- Inventors: Wilburn Ray Whittington; Raj Prahbu; Shane Andrew Brauer
- Web page: https://patentgrep.com/patent/US20140152452A1

## CPC

- G01S 3/14: Systems for determining direction or deviation from predetermined direction {(aerial arrangements for changing or varying the orientation or the shape of the directional pattern H01Q3/00; combinations of different interacting aerial units for giving a desired directional characteristic H01Q21/29; aerials or aerial systems providing at least two radiation patterns H01Q25/00)}
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES

## Abstract

An RF directional detection system created for alerting hunters of nearby friendlies who are located in critical areas defined by the ability to communicate their directional position to the hunters for safety purposes. These systems utilize a Yagi directional antenna to provide the radiation pattern necessary for directional detection.

## Claims

### Claim 1

An RF system for alerting hunters of unwanted targets in the hunter's discharge direction comprising of a Yagi antenna which captures a transmitted signal from the target of interest, a signal processing circuit which evaluates the signal, and an alarm which is triggered from the signal processing circuit.

### Claim 2

The use of a Yagi anteena to provide directional sensing of RF for the purpose of monitoring the relative direction between a RF transmitter and a firearm.