ANTENNA, AND CIRCUIT BOARD HAVING AN ANTENNA
An antenna includes a sheet of metallic material and a notch defined in an interior portion of the sheet of metallic material. The notch is defined by a base that includes an inner edge of the sheet of metallic material, a first leg that intersects the base and includes a first edge of the sheet of metallic material, and a second leg that intersects the base and includes a second edge of the sheet of metallic material. The first and second legs extend from the base and toward each other to define an open apex region on an outer edge of the sheet of metallic material. The antenna includes a first exterior standoff that extends from the first edge, a second exterior standoff that extends from the second edge, a first feed spacer that extends into the notch, and a first crossover spacer that extends into the open apex region.
1 . An antenna comprising:
a sheet of metallic material;
a notch defined in an interior portion of the sheet of metallic material, wherein the notch is defined by a base that includes an inner edge of the sheet of metallic material, a first leg that intersects the base and includes a first edge of the sheet of metallic material, and a second leg that intersects the base and includes a second edge of the sheet of metallic material, and wherein the first leg and the second leg extend from the base and toward each other to define an open apex region on an outer edge of the sheet of metallic material opposite the inner edge;
a first exterior standoff that extends from the first edge;
a second exterior standoff that extends from the second edge;
a first feed spacer that extends into the notch; and
a first crossover spacer that extends into the open apex region.
2 . The antenna of claim 1 , wherein the notch is triangular.
3 . The antenna of claim 1 , wherein:
the sheet of metallic material defines an outer surface that defines and resides in a main plane; and
at least one of the first exterior standoff, the second exterior standoff, the first feed spacer, and the first crossover spacer defines an offset plane that is offset from the main plane.
4 . The antenna of claim 3 , wherein the first exterior standoff and the second exterior standoff have respective solder surfaces that define the offset plane.
5 . The antenna of claim 3 , wherein the first feed spacer has a baseplate that defines the offset plane.
6 . The antenna of claim 3 , wherein the first crossover spacer has a baseplate that defines the offset plane.
7 . The antenna of claim 3 , further comprising a spine proximate to the base that extends toward the offset plane.
8 . The antenna of claim 7 , wherein the spine extends (i) inward from the base toward the notch or (ii) from the inner edge.
9 . The antenna of claim 7 , wherein the spine does not intersect the offset plane.
10 . The antenna of claim 1 , further comprising:
a third exterior standoff that extends from the first edge; and
a fourth exterior standoff that extends from the second edge.
11 . The antenna of claim 1 , wherein the first feed spacer extends from the first leg, the antenna further comprising a second feed spacer that extends into the notch from the second leg.
12 . The antenna of claim 11 , further comprising:
a first interior standoff that extends into the notch from the first leg; and
a second interior standoff that extends into the notch from the second leg.
13 . The antenna of claim 1 , wherein the first crossover spacer extends into the open apex region from the first leg, the antenna further comprising a second crossover spacer that extends into the open apex region from the second leg.
14 . A circuit board comprising the antenna of claim 1 .
15 . A circuit board, comprising:
a board edge;
a ground plane;
a recess defined within the ground plane, wherein the recess defines an interior periphery and an opening to the board edge;
a feed line that extends into the recess; and
an antenna coupled to the circuit board, the antenna comprising:
a sheet of metallic material;
a notch defined in an interior portion of the sheet of metallic material, wherein the notch is triangular and is at least partially located over the recess, the notch is defined by a base that includes an inner edge of the sheet of metallic material, a first leg that intersects the base and includes a first edge of the sheet of metallic material, and a second leg that intersects the base and includes a second edge of the sheet of metallic material, the first leg and the second leg extend from the base and toward each other to define an open apex region on an outer edge of the sheet of metallic material opposite the inner edge, and the open apex region opens toward the board edge;
a first exterior standoff that extends from the first edge;
a second exterior standoff that extends from the second edge;
a first feed spacer that extends into the notch; and
a first crossover spacer that extends into the open apex region.
16 . The circuit board of claim 15 , wherein:
the first exterior standoff, the second exterior standoff, and the first crossover spacer are electrically coupled to the ground plane; and
the first feed spacer is electrically coupled to the feed line by way of a reactive network disposed within the recess.
17 . The circuit board of claim 15 , wherein:
the sheet of metallic material defines an outer surface that defines and resides in a main plane;
at least one of the first exterior standoff, the second exterior standoff, the first feed spacer, and the first crossover spacer defines an offset plane that is offset from the main plane;
the first exterior standoff and the second exterior standoff have respective solder surfaces that define the offset plane;
the first feed spacer has a first baseplate that reside in the offset plane; and
the first crossover spacer has a second baseplate that resides in the offset plane.
18 . The circuit board of claim 15 , wherein the antenna further comprises a spine proximate to the base that extends toward the circuit board, wherein the spine extends (i) inward from the base toward the notch and toward the circuit board or (ii) from the inner edge toward the circuit board.
19 . The circuit board of claim 15 , wherein the antenna further comprises:
a third exterior standoff that extends from the first edge; and
a fourth exterior standoff that extends from the second edge.
20 . The circuit board of claim 15 , wherein:
the first feed spacer extends from the first leg and the antenna further comprises a second feed spacer that extends into the notch from the second leg;
the antenna further comprises a first interior standoff that extends into the notch from the first leg;
the antenna further comprises a second interior standoff that extends into the notch from the second leg;
the first crossover spacer extends into the open apex region from the first leg; and
the antenna further comprises a second crossover spacer that extends into the open apex region from the second leg.