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QUANTIFYING EXCITATION OF GROUND WAVES BY BURIED AND NEAR-EARTH ANTENNAS

Award Information

Agency:
Department of Defense
Branch:
Air Force
Award ID:
9198
Program Year/Program:
1988 / SBIR
Agency Tracking Number:
9198
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Technology For Communications
222 CASPIAN DRIVE Sunnyvale, CA 94089
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1988
Title: QUANTIFYING EXCITATION OF GROUND WAVES BY BURIED AND NEAR-EARTH ANTENNAS
Agency / Branch: DOD / USAF
Contract: N/A
Award Amount: $49,911.00
 

Abstract:

AN IMPORTANT FUNCTION OF SURVIVABLE C(3) SYSTEMS IS GROUND WAVE COMMUNICATION FOLLOWING A NUCLEAR EVENT. ANTENNAS MOST LIKELY TO SURVIVE SUCH EVENTS ARE BURIED OR LOW PROFILE NEAR-THE-EARTH ANTENNAS. HOWEVER, THE GROUND WAVE FIELD STRENGTH FOR SUCH ANTENNAS IS NOT EASILY CALCULATED. USUALLY, SUCH CALCULATIONS ARE BASED ON COMPARING THE ANTENNA IN QUESTION TO A "STANDARD" ELECTRICALLY SHORT VERTICAL MONOPOLE. FIELD STRENGTH CURVES ARE READILY AVAILABLE FOR THE "STANDARD" ANTENNA FROM SUCH SOURCES AS THE CCIR RECOMMENDATION 368-4. SUCH GAIN DETERMINATIONS AT ZERO DEGREES ELEVATION ANGLE, HOWEVER, ASSUME PERFECTLY CONDUCTING EARTH. THIS METHOD CANNOT BE APPLIED TO BURIED ANTENNAS SINCE THEY WOULD NOT RADIATE IN A PREFECTLY CONDUCTING EARTH. THEIR ABILITY TO RADIATE DEPENDS UPON THE EARTH'S FINITE CONDUCTIVITY AND PERMITTIVITY. THEREFORE, OTHER METHODS OF CALCULATION MUST BE USED. TCI PROPOSES TO UTILIZE ITS ANALYTICAL EXPERTISE TO ACCURATELY ANALYZE BURIED OR NEAR-EARTH HF ANTENNAS AND DEVELOP SPACE WAVE GAIN, EFFICIENCY AND GROUND WAVE STRENGTH OF THESE BURIED OR NEAR-EARTH ANTENNAS. A GOAL OF THE EFFORT WILL BE TO ESTABLISH A RELATIONSHIP BETWEEN THE GROUND WAVE LAUNCHING EFFICIENCY OF BURIED AND NEAR-EARTH ANTENNAS AND THE MORE CONVENTIONAL VERTICAL MONOPOLES, WHICH WILL PERMIT THE USE OF AVAILABLE GROUND WAVE PROPAGATION CURVES AND CALCULATION TECHNIQUES TO PREDICT THE PERFORMANCE OF C(3) APPLICATIONS OF BURIED AND NEAR-EARTH ANTENNAS.

Principal Investigator:

Dr robert l tanner
4159625200

Business Contact:

Small Business Information at Submission:

Technology For Communications
1625 Stierlin Rd Mountain View, CA 94043

EIN/Tax ID:
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No