Antenna module, manufacturing method thereof, and collective board
An antenna module including a dielectric substrate formed by stacking a plurality of dielectric layers, a radiating element formed on or in the dielectric substrate, a ground electrode facing the radiating element, and peripheral electrodes that are formed in a plurality of layers between the radiating element and the ground electrode at an outer periphery of the dielectric substrate.
1. An antenna module comprising:
a dielectric substrate formed by stacking a plurality of dielectric layers;
a plurality of radiating elements formed on or within the dielectric substrate;
a ground electrode facing the plurality of radiating elements; and
peripheral electrodes formed in the plurality of dielectric layers between the plurality of radiating elements and the ground electrode at an outer periphery of the dielectric substrate when viewed in a plan view in a normal direction of the dielectric substrate, the peripheral electrodes being electrically coupled to the ground electrode,
wherein a length of a first peripheral electrode disposed along a long side of the dielectric substrate, among the peripheral electrodes, is different from a length of a second peripheral electrode disposed along a short side of the dielectric substrate, among the peripheral electrodes.
2. The antenna module of claim 1 , wherein
the plurality of dielectric layers are stacked such that the peripheral electrodes form conductive walls.
3. The antenna module of claim 1 , wherein
the peripheral electrodes are capacitive-coupled to the ground electrode.
4. The antenna module of claim 1 , further comprising:
a plurality of vias that connect the peripheral electrodes to each other.
5. The antenna module of claim 1 , further comprising:
a plurality of vias that connect the peripheral electrodes and the ground electrode.
6. The antenna module of claim 4 , wherein
when the plurality of vias are viewed in the plan view in the normal direction of the dielectric substrate, vias formed in adjacent dielectric layers of the plurality of dielectric layers do not overlap.
7. The antenna module of claim 1 , wherein
the peripheral electrodes are formed in all dielectric layers between the plurality of radiating elements and the ground electrode.
8. The antenna module of claim 1 , wherein
a plurality of cavities are formed in the peripheral electrodes.
9. The antenna module of claim 1 , wherein
when the peripheral electrodes are viewed in the plan view in the normal direction of the dielectric substrate, the peripheral electrodes are symmetrically arranged with respect to the plurality of radiating elements.
10. The antenna module of claim 1 , wherein
in the dielectric substrate, a wiring region is formed in a dielectric layer opposite to the plurality of radiating elements with respect to the around, electrode, and
the wiring region does not include the peripheral electrodes.
11. The antenna module of claim 1 , wherein
when viewed in the plan view in the normal direction of the dielectric substrate, as the peripheral electrodes approach the ground electrode, the peripheral electrodes approach a center of the plurality of radiating elements.
12. The antenna module of claim 1 , wherein
the dielectric substrate includes first and second sides of a first length and third and fourth sides of a second length, the first length being greater than the second length.
13. The antenna module of claim 12 , wherein
a first plurality of the peripheral electrodes formed along a periphery of the first and second sides have a third length in a lengthwise direction of the first and second sides, and
a second plurality of the peripheral electrodes formed along a periphery of the third and fourth sides have a fourth length in a lengthwise direction of the third and fourth sides.
14. The antenna module of claim 13 , wherein
the third length of the first plurality of the peripheral electrodes is less than the fourth length of the second plurality of the peripheral electrodes.
15. The antenna module of claim 13 , wherein
a number of the first plurality of the peripheral electrodes is greater than a number of the second plurality of the peripheral electrodes.
16. The antenna module of claim 1 , wherein
the length of the first peripheral electrode is less than the length of the second peripheral electrode.
17. The antenna module of claim 1 , wherein
a width of the first peripheral electrode is less than a width of the second peripheral electrode.
18. The antenna module of claim 1 , wherein
the first peripheral electrode is among a plurality of first peripheral electrodes spaced apart from one another.
19. An antenna module comprising:
a dielectric substrate formed by stacking a plurality of dielectric layers;
a plurality of radiating elements formed on or within the dielectric substrate;
a ground electrode facing the plurality of radiating elements; and
peripheral electrodes formed in the plurality of dielectric layers between the plurality of radiating elements and the ground electrode, the peripheral electrodes being electrically coupled to the ground electrode and including:
first peripheral electrodes disposed along a long side of the dielectric substrate; and
second peripheral electrodes disposed along a short side of the dielectric substrate,
wherein the first peripheral electrodes have a length that is less than a length of the second peripheral electrodes.
20. The antenna module of claim 19 , wherein a width of the first peripheral electrode is less than a width of the second peripheral electrode.