Multi-fed patch antennas and devices including the same
A radio frequency (RF) device may include a radio frequency integrated circuit (RFIC) chip and an antenna module on an upper surface of the RFIC chip. The antenna module may include a first patch parallel to the RFIC chip and having an upper surface configured to emit radiation in a vertical direction opposite the first patch from the RFIC chip, a ground plate parallel to the first patch, and between the first patch and the RFIC chip, and a first plurality of feed lines connected to a lower surface of the first patch and configured to supply at least one first differential signal to the first patch from the RFIC chip.
1. A radio frequency (RF) device, comprising:
a radio frequency integrated circuit (RFIC) chip; and
an antenna module on an upper surface of the RFIC chip, the antenna module comprises:
a first patch parallel to the RFIC chip and having an upper surface configured to emit radiation in a vertical direction opposite the first patch from the RFIC chip,
a ground plate parallel to the first patch, and between the first patch and the RFIC chip, and
a first plurality of feed lines connected to a lower surface of the first patch and configured to supply a plurality of first sets of differential signals to the first patch from the RFIC chip, each of the plurality of first sets of differential signals including two signals of opposite phase, wherein
the first plurality of feed lines comprise:
a first feed line and a second feed line respectively connected to a first feed point and a second feed point on the lower surface of the first patch and configured to supply one of the plurality of first sets of differential signals to the first patch, and
a third feed line and a fourth feed line respectively connected to a third feed point and a fourth feed point on the lower surface of the first patch and configured to supply another one of the plurality of first sets of differential signals to the first patch,
the first feed point, the second feed point, the third feed point and the fourth feed point are disposed on the lower surface of the first patch for a dual polarization.
2. The RF device of claim 1 , wherein
the first feed point and the second feed point are separated in a first horizontal direction.
3. The RF device of claim 2 , wherein the first feed point and the second feed point are proximate to a first center line crossing a center of the first patch in the first horizontal direction.
4. The RF device of claim 2 , wherein the first feed point and the second feed point are equally proximate to a center of the first patch.
5. The RF device of claim 2 , wherein
the first feed line comprises a first portion extending in the first horizontal direction and a second portion extending in the vertical direction, and
the second feed line comprises a first portion extending in the first horizontal direction and a second portion extending in the vertical direction.
6. The RF device of claim 2 , wherein each of the upper surface of the first patch and the lower surface of the first patch have a rectangular shape including a pair of sides parallel to the first horizontal direction.
7. The RF device of claim 2 , wherein
the third feed point and the fourth feed point are separated in a second horizontal direction perpendicular to the first horizontal direction.
8. The RF device of claim 7 , wherein the third feed point and the fourth feed point are proximate to a second center line crossing a center of the first patch in the second horizontal direction.
9. The RF device of claim 7 , wherein the third feed point and the fourth feed point are equally proximate to a center of the first patch.
10. The RF device of claim 7 , wherein
the third feed line comprises a first portion extending in the second horizontal direction and a second portion extending in the vertical direction, and
the fourth feed line comprises a first portion extending in the second horizontal direction and a second portion extending in the vertical direction.
11. The RF device of claim 7 , wherein the antenna module further comprises:
a second patch separated from the first patch in the first horizontal direction; and
a second plurality of feed lines connected to a lower surface of the second patch and configured to supply at least one second differential signal to the second patch from the RFIC chip.
12. The RF device of claim 11 , wherein the antenna module further comprises:
a third patch separated from the first patch in the second horizontal direction;
a fourth patch separated from the second patch in the second horizontal direction; and
a third plurality of feed lines respectively connected to lower surfaces of the third patch and the fourth patch and configured to supply at least one third differential signal to the third patch and the fourth patch from the RFIC chip.
13. The RF device of claim 1 , wherein the antenna module further comprises a top-patch parallel to the first patch over the upper surface of the first patch.
14. The RF device of claim 1 , wherein the RFIC chip comprises:
at least one phase shifter configured to generate the plurality of first sets of differential signals.
15. The RF device of claim 1 , wherein
the upper surface of the first patch is further configured to receive radiation and provide corresponding signals to the RFIC chip via the first plurality of feed lines, and
the RFIC chip comprises at least one phase shifter configured to process the signals received through the first plurality of feed lines.
16. An antenna module comprising:
a ground plate;
a first patch parallel to the ground plate and having an upper surface configured to emit radiation in a vertical direction opposite the first patch from the ground plate; and
a first plurality of feed lines respectively connected to a first plurality of feed points on a lower surface of the first patch and configured to supply a plurality of first sets of differential signals to the first patch, each of the plurality of first sets of differential signals including two signals of opposite phase, wherein
the first plurality of feed points comprise:
a first feed point and a second feed point separated from each other in a first horizontal direction for a first polarization, and
a third feed point and a fourth feed point separated from each other in a second horizontal direction perpendicular to the first horizontal direction for a second polarization.
17. The antenna module of claim 16 , wherein
the first feed point and the second feed point are proximate to a first center line crossing a center of the first patch in the first horizontal direction, and
the third feed point and the fourth feed point are proximate to a second center line crossing the center of the first patch in the second horizontal direction.
18. The antenna module of claim 16 , wherein
the first feed point and a second feed point are equally proximate to a center of the first patch, and
the third feed point and the fourth feed point are equally proximate to the center of the first patch.
19. The antenna module of claim 16 , further comprising:
a second patch separated from the first patch in the first horizontal direction; and
a second plurality of feed lines respectively connected to a second plurality of feed points on a lower surface of the second patch.
20. The antenna module of claim 19 , further comprising:
a third patch separated from the first patch in the second horizontal direction;
a fourth patch separated from the second patch in the second horizontal direction; and
a third plurality of feed lines respectively connected to a third plurality of feed points on lower surfaces of the third patch and the fourth patch.