Radar high frequency module
View Patent ↗A radar high frequency module having at least one distance piece mounted at the flat top wall of the shielding cover for supporting the shielding cover on the printed circuit board without mechanical contact of the downwardly extending side walls of the shielding cover with the printed circuit board to allow alignment of a rod antenna to a patch antenna arranged on the printed circuit board with greater precision. The side walls may be fixed to the printed circuit board by a conductive adhesive.
1. A radar high frequency module, comprising:
a printed circuit board carrying microwave components including a patch antenna;
a shielding cover having a flat top wall and downwardly extending side walls, the flat top wall having a hole and the shielding cover being positioned on the printed circuit board to cover the microwave components;
a dielectric rod antenna extending through and being held in the hole in the flat top wall of the shielding cover and being transmissively coupled to the patch antenna; and
at least one distance piece mounted at the top wall of the shielding cover and supporting the shielding cover on the printed circuit board at a supported position, wherein the shielding cover is supported by the at least one distance piece without direct mechanical contact of the side walls with the printed circuit board at the supported position.
2. The radar high frequency module according to claim 1 , wherein the at least one distance piece comprises three distance pieces arranged in a triangular configuration.
3. The radar high frequency module according to claim 2 , wherein one distance piece of the three distance pieces is integrally formed with the dielectric rod antenna.
4. The radar high frequency module according to claim 3 , wherein an end of the dielectric rod antenna comprises a recess which accommodates the patch antenna and wherein an outer edge of the recess of the dielectric rod antenna rests on the printed circuit board.
5. The radar high frequency module according to claim 1 , wherein the at least one distance piece is integrally formed with the dielectric rod antenna.
6. The radar high frequency module according to claim 1 , wherein the dielectric rod antenna is injection-molded into the hole in the flat top wall of the shielding cover.
7. The radar high frequency module according to claim 1 , wherein the at least one distance piece is injection-molded into the hole in the flat top wall of the shielding cover.
8. The radar high frequency module according to claim 1 , wherein the printed circuit board includes a trench on a side carrying the microwave components, and wherein distal ends of the downwardly extending side walls of the shielding cover are moveably received the trench.
9. The radar high frequency module according to claim 1 , wherein the distal ends of the downwardly extending side walls of the shielding cover are fixed to the printed circuit board by a conductive adhesive.
10. The radar high frequency module according to claim 1 , further comprising at least one fiducial mark arranged on the printed circuit board outside an area covered by the shielding cover and at a defined distance to the patch antenna.