Navy Shore Station Communication Antennas

Shore Station LF & VLF Antennas - See VLF transmitting antenna design and NAVELEX 0101, LF & VLF Systems Handbook

Jim Creek Valley Span VLF
jimcreek-ant-01.JPG (54673 bytes)
Yosami Triatic  VLF
yosami-02.JPG (207887 bytes)
Lualualei Triatic VLF
lua-ant-01.JPG (69346 bytes)
Harold E Holt (North West Cape) Tri-Deco VLF
holt-ant-01.JPG (373350 bytes)
Balboa Triatic  VLF
balboa-ant-01.JPG (67726 bytes)
Cutler Tri-Deco VLF
cutler-ant-103.JPG (43064 bytes)

 

Annapolis Goliath VLF
annapolis-ant-01.JPG (139074 bytes)

Nord LF folded unipole antenna - top fed tower
ant-nord-120401.JPG (98560 bytes)

Nord LF antenna - NPG Stockton
ant-nord-npg-01a.JPG (1216086 bytes)

 


Shore Station HF Antennas - See NAVELEX 0101,104 HF Antenna Handbook

Typical Receiver Site Antenna Layout
rcvr-ant-82.JPG (60900 bytes)
Rhombic
rcvr-ant-91.JPG (76153 bytes)

 

3-Wire Rhombic
rhombic-01.JPG (6176 bytes)

Nested Rhombic 
rcvr-ant-84.JPG (50878 bytes)

Quadrant
ant-quad-1102-01.JPG (405548 bytes)
600 Ohm Terminator for Rhombic

ant-ter500-1311-01.jpg (112541 bytes)

ant-ter500-1311-02.jpg (89317 bytes) ant-ter500-1311-05.jpg (92748 bytes) ant-ter500-1311-06.jpg (82365 bytes)
ant-ter500-1311-07.jpg (98904 bytes) ant-ter500-1311-03.jpg (99427 bytes) ant-ter500-1311-04.jpg (143539 bytes) --
Conical Monopole Antenna - The conical monopole antenna is used in HF communications. It is a broadband, vertically polarized, compact omnidirectional antenna. This antenna is adaptable to ship-to-shore, broadcast, and ground-to-air communications. It is used both ashore and aboard ship. When operating at frequencies near the lower limit of the HF band, the conical radiates in much the same manner as a regular vertical antenna. At the higher frequencies, the lower cone section radiates, and the top section pushes the signal out at a low angle as a sky wave. This low angle of radiation causes the sky wave to return to the Earth at great distances from the antenna.  Therefore, this antenna is well suited for long-distance communications in the HF band.

Conical Monopole
AS-2205/FRC (7-28 mc)

ant-con-1103-02.JPG (224408 bytes)

Conical Monopole
Hy-Gain 2012AA (3-30 mc)

ant-2012aa-1103-01.JPG (169120 bytes)

ant-2012aa-1103-03.JPG (429210 bytes)

Conical Monopole
Hy-Gain 2012AA details

ant-2012aa-1103-02.JPG (271012 bytes)

"Performance Evaluation of Conical Monopole" -  Dec. 1992 NPS Thesis (download 2.6 MB pdf)

Conical Monopole -Hy-Gain 2012AA - Kato Souli Greece
2012 AA HG CONICAL MONOPOLE 7.JPG (42089 bytes)

2012 AA 8.JPG (45273 bytes)

Inverted Cone Antenna - The inverted cone antenna is vertically polarized, omnidirectional, and very broadbanded. It is used for HF communications in ship-to-shore, broadcast, and ground-to-air applications. The radial ground plane that forms the ground system for inverted cones is typical of the requirement for vertically polarized, ground-mounted antennas. The radial wires are one-quarter-wavelength long at the lowest designed frequency.
Inverted Cone
AS-2212/FRC (2-30 mc)
AS-2213/FRC (2.5-30 mc)
AS-2214/FRC (3-32 mc)

inc-cone-01.jpg (7385 bytes)

Inverted Cone - Kato Souli Greece
inv-cone-K_SOULI.JPG (44712 bytes)
Inverted Cone (Kato Souli)
INVERTED CONE KATO SOULI 2.JPG (49533 bytes)
Elevated Discone
ant-con-1103-01.JPG (210096 bytes)
Sleeve Antenna - The sleeve antenna is used primarily as a receiving antenna. It is a broadband, vertically polarized, omnidirectional antenna. Its primary uses are in broadcast, ship-to-shore, and ground-to-air communications. Although originally developed for shore stations, there is a modified version for shipboard use. Photos below show a sleeve antenna for shore stations. Sleeve antennas are especially helpful in reducing the total number of conventional narrowband antennas that otherwise would be required to meet the requirements of shore stations. With the use of multicouplers, one sleeve antenna can serve several receivers operating over a wide range of frequencies. This feature also makes the sleeve antenna ideal for small antenna sites. When used for transmitting, sleeve antennas can typically handle 30kw with less than 3:1 VSWR over a 3:1 frequency range
sleeve-01.jpg (20185 bytes) Sleeve Antenna at NPG - this has two wire-spreaders in the vertical section
ant-sleeve-npg-01a.JPG (1137382 bytes)
Sleeve Antenna at NPG 
ant-sleeve-npg-02a.JPG (671206 bytes)

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Sleeve Antenna dimensions
sleeve-dim-01.JPG (298518 bytes)
Sleeve Antenna dimensions
sleeve-dim-03.JPG (196118 bytes)
Sleeve Antenna with reflector and director
sleeve-dim-02.JPG (555272 bytes)
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Fixed Log Periodics
ant-lp-1103-01.JPG (306156 bytes)
Vertical Fixed Log Periodics
rcvr-ant-83.JPG (90980 bytes)

Sector Vertical Log Periodic
ant-lp-1103-02.JPG (160774 bytes)

Horizontal Fixed Log Periodic
(Kato Souli)

LP HF 10.JPG (57244 bytes)

Antenna Lead Switching System
xmtr-sw-01.JPG (81809 bytes)

Switchyard - Barrigada Guam
switchyard-barrigada-01.jpg (54416 bytes)

Rotatable Log Periodic
ant-lp-1103-03.JPG (515293 bytes)
Rotatable Log Periodic
 - Nea Makri Greece
LP-ROT-N-MAKRI-01.JPG (36056 bytes)
AS-3482 Rotatable Log Periodic
ant-as3482-rlp-1402.jpg (1851148 bytes)
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Rotatable Log Periodic
shore-6506-02.JPG (106522 bytes)
Rotatable Log Periodic
 - Nea Makri Greece
LP-ROT-N-MAKRI-02.JPG (33487 bytes)
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AN/FRA-109
(similar to AN/FRA-107)

ant-fra-1103-00.JPG (517185 bytes)

fra109-02.JPG (177954 bytes)

4-30 mc, 600kw PEP transmitting antenna system - steerable beam or omnidirectional

FRA-109 Monopole
ant-fra-1103-02.JPG (419499 bytes)

FRA-109 reflector
ant-fra-1103-01.JPG (348772 bytes)

Kato Souli Greece
CONICAL MONOPOLE KATO SOULI 1.JPG (63222 bytes)

Kato Souli Greece
3 CON MON GENERAL VIEW 12.JPG (49098 bytes)

AN/FRD-10

AN/FRD-10 CDAA page

frd10-imp-01.jpg (44451 bytes)

CDAA Receiving Antenna System

Mainly used for NAVSECGRU DF/Intercept - but several were also used for COMMSTA general service communications

AN/FRD-10 CDAA page

CDAA Components
rcvr-ant-86.JPG (104695 bytes)
AN/TRA-40 CDAA
ant-tra40-1103-01.JPG (672122 bytes)
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