Techniques for designing millimeter wave printed dipole antennas
A printed millimeter wave dipole antenna and techniques for designing such an antenna are disclosed. In one embodiment, the dipole antenna comprises: a signal wing and at least one ground wing for propagating signals in a millimeter wave band; and an unbalanced feeding structure directly coupled to the signal wing. The unbalanced feeding structure is boarded by a plurality of escorting vias to ensure equipotential grounds.
1. An apparatus, comprising:
a substrate comprising a plurality of ground layers;
a signal wing and at least one ground wing, said at least one ground wing being coupled to at least one of the plurality of ground layers; and
an unbalanced feeding structure coupled to the signal wing, wherein the unbalanced feeding structure is boarded by a plurality of vias coupled to the ground layers, wherein the plurality of ground layers comprise a first ground layer and a second ground layer, and wherein the least one ground wing includes a first ground wing coupled to the first ground layer and a second ground wing coupled to the second ground layer.
2. The apparatus of claim 1 , wherein the unbalanced feeding structure is a stripline routed between the first ground layer and the second ground layer.
3. The apparatus of claim 2 , wherein the signal wing and the unbalanced feeding structure form an antenna used to propagate signals in a frequency band.
4. The apparatus of claim 3 , wherein the antenna is printed on a layer of the substrate between the first ground layer and the second ground layer.
5. The apparatus of claim 3 , wherein the frequency band is a 60 GHz frequency band.
6. The apparatus of claim 1 , wherein the unbalanced feeding structure further comprises a tapered balun.
7. The apparatus of claim 6 , wherein the tapered balun extends from at least one of the plurality of ground layers to the signal wing.
8. The apparatus of claim 7 , wherein the tapered balun is shaped as a trapezoid, wherein a first base of the trapezoid is narrower than a second base of the trapezoid, wherein the first base of the trapezoid is closer to the signal wing than the second base of the trapezoid.
9. The apparatus of claim 1 , further comprising at least one signal director, wherein the at least one signal director is placed in front of the at least one ground wing and the signal wing.
10. A computing device, comprising:
a substrate comprising a plurality of ground layers;
a signal wing and at least one ground wing, the ground wing coupled to at least one of the plurality of ground layers;
an unbalanced feeding structure coupled to the signal wing, wherein the unbalanced feeding structure is boarded by a plurality of vias coupled to the ground layers; and
a radio frequency (RF) circuit configured to transmit or receive signals via the signal wing and the at least one ground wing, wherein the plurality of ground layers comprise a first ground layer and a second ground layer, and wherein the least one ground wing includes a first ground wing coupled to the first ground layer and a second ground wing coupled to the second ground layer.