Browse Prior Art Database

Radar Antenna Stand

IP.com Disclosure Number: IPCOM000060045D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Ernst, JR: AUTHOR

Abstract

A single stand for testing different horn-type RF antennas is described. Height positioning, as well as 90Πrotational positioning for vertical/horizontal polarity, is accommodated. Test stand 10 (Fig.1) consists of base plate 11 on which are securely mounted two hollow vertical supports (masts) 12. Each mast 12 contains a movable chain 13 attached to sprockets 14 at the lower and upper ends of masts 12. Both chains are uniformly driven by common shaft 15 attached to gear box 16 mounted on plate 11. Crank 17 provides rotatory motion to gear box 16. Cradle 18 is attached to chains 13 through slots 19. Cradle 18 is provided with a semicircular arc 20 of a fixed diameter. Adapter plate 21 (Fig. 2) serves as a mount for various horn configurations.

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Radar Antenna Stand

A single stand for testing different horn-type RF antennas is described. Height positioning, as well as 90OE rotational positioning for vertical/horizontal polarity, is accommodated. Test stand 10 (Fig.1) consists of base plate 11 on which are securely mounted two hollow vertical supports (masts) 12. Each mast 12 contains a movable chain 13 attached to sprockets 14 at the lower and upper ends of masts 12. Both chains are uniformly driven by common shaft 15 attached to gear box 16 mounted on plate 11. Crank 17 provides rotatory motion to gear box 16. Cradle 18 is attached to chains 13 through slots 19. Cradle 18 is provided with a semicircular arc 20 of a fixed diameter. Adapter plate 21 (Fig. 2) serves as a mount for various horn configurations. Adapter plate 21 is a split plate with the same fixed diameter as arc 20, and with a unique center hole configuration 22 to fit each separate RF antenna horn. Pins 21A are mounted on each plate and are disposed at a 90OE angle, and act as stops for the correct antenna positions. In operation, plate 21, unique to the antenna under test, is mounted on the antenna horn, and the assembly is placed in semicircular slotted arc 20. Plate 20 is then rotated until the pins are checked by stops 23 in cradle
18. The direction of rotation will determine either a horizontal or vertical polarization. The height of the assembly is accurately controlled by rotating crank
17. At the proper height, crank 17 can be rever...