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GROUND PLANES AND
SHIELDS
SIMPLE TECHNIQUES CAN USE READILY AVAILABLE MATERIALS
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When dealing with R.F., High
Speed Digital, as well as certain Analog circuit prototypes, It is often desirable to
incorporate Ground Planes, Shields, and Enclosures.
The following applications make use of common readily available materials found at
hardware stores, hobby shops, or obtainable from specialty catalogs, including Foil Tapes,
Thin Metal sheets (copper or brass), and conventional Copper Clad Laminate.
These methods permit the fabrication of localized circuit shields and ground planes
when desired, and extend the versatility of Surfboards.
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The circuit example at left shows model
9081, 9161, and 9162 Surfboards attached to a piece of copper clad serving as a common
ground plane. The boards may be attached by adhesive, or soldered in place with wire
straps tied to the ground plane. |
Local shields and enclosures (right) can be fabricated from thin (.008-.010
in. typ.) copper or brass sheet. The thin materials are easy to bend and cut, and can be
soldered in place if desired. Aluminum or steel may be used as well, but may not be easily
soldered. Combine with ground plane if needed. |
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Surfboard models with SIP
pins can also be accommodated as shown at left. Shields and ground planes may be cut and
attached to the back of a Surfboard, or boards can be enclosed in small shapes formed out
of thin metal stock, taking care not to short the pins. |
The local hardware store offers a multitude of enclosure possibilities. Standard
fittings made of copper or brass can serve as inexpensive, and customizable housings, and
can be soldered to readily. Additionally, a range of other fittings and aluminum
extrusions can be utilized if solder connections are not needed, or connection is to be
made by mechanical means |
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In addition to the above methods, Copper or Foil tapes may be used. Some specialty
catalogs offer these tapes in a variety of widths and adhesive arrangements. Use
epoxy or other suitable adhesives to secure shields and ground planes when
solder joints can not be used, or to secure boards to enclosures. |
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