Test apparatus and pallet for parallel RF testing of printed circuit boards
A test apparatus features an upper RF impermeable hood and lower RF impermeable hood, wherein each of the hoods have internal dividers. When in a closed position, the hoods and dividers create two or more RF impermeable chambers. The hoods are configured to enclose or sandwich a pallet supporting two or more printed circuit boards. One of the printed circuit boards is disposed in each chamber formed by the hoods and dividers.
1. A test apparatus for parallel testing of printed circuit boards, the testing including RF testing at an RF frequency having a wavelength, the apparatus comprising:
a pallet for holding at least two printed circuit boards;
a lower RF-impermeable hood having a lower divider within its interior; and
an upper RF-impermeable hood internally supporting a test probe for each printed circuit board, and having an upper divider within its interior, wherein the pallet is between the lower RF-impermeable hood and the upper RF-impermeable hood when the hoods are in a closed position,
and wherein the upper and lower dividers separate adjacent printed circuit boards, and wherein the upper divider and lower divider are within one quarter of the wavelength of each other when in the closed position.
2. The test apparatus claimed in claim 1 , wherein the pallet includes at least two apertures, each for supporting one of the printed circuit boards, wherein the pallet includes an upper surface and a lower surface, and wherein the upper surface defines an upper divider groove extending between the at least two apertures for receiving a tongue of the upper divider, and the lower surface defines a lower divider groove extending between the at least two apertures for receiving a tongue of the lower divider, when the hoods are in the closed position.
3. The test apparatus claimed in claim 1 , wherein the pallet includes at least two apertures, each for supporting one of the printed circuit boards, wherein the pallet defines a divider slot between the two apertures, and wherein the upper divider and lower divider each extend into the divider slot and are less than one quarter of the wavelength apart when the hoods are in the closed position.
4. The test apparatus claimed in claim 1 , wherein the pallet includes at least two apertures, each for supporting one of the printed circuit boards, wherein the pallet includes an upper surface and a lower surface, and wherein the upper surface defines an upper circumferential groove surrounding the at least two apertures for receiving a downwardly depending tongue on the peripheral edge of the upper RF impermeable hood, and the lower surface defines a lower circumferential groove surrounding the at least two apertures for receiving a upwardly depending tongue on the peripheral edge of the lower RF impermeable hood, when the hoods are in the closed position.
5. The test apparatus claimed in claim 4 , wherein the downwardly depending tongue and the upwardly depending tongue are less than one quarter of the wavelength apart when in their respective grooves.
6. The test apparatus claimed in claim 5 , wherein the lower circumferential groove and the upper circumferential groove are offset from each other by no more than one quarter of the wavelength.
7. The test apparatus claimed in claim 1 , wherein the upper RF impermeable hood, the lower RF impermeable hood, the upper divider and the lower divider define at least two chambers when the closed position, each chamber containing a portion of the pallet supporting one of the at least two printed circuit boards.