Phase shifting apparatus and electrically adjustable antenna

1. A phase shifting apparatus, wherein comprising:

a grounding plate;

at least two bottom substrates arranged on respective sides of the grounding plate and coupled to the grounding plate;

at least two top substrates arranged on respective sides of the two bottom substrates, wherein a first one of the top substrates and a first one of the bottom substrates form a first phase shifting unit, wherein a second one of the top substrates and a second one of the bottom substrates form a second phase shifting unit; and

a rod coupled to the two top substrates, wherein the rod is configured to adjust a relative sliding movement between the at least two top substrates and the at least two bottom substrates and to simultaneously adjust a phase of an output signal of each phase shifting unit.

2. The phase shifting apparatus according to claim 1 , wherein,

each of the bottom substrates is provided with at least one signal input line and at least one phase-shift signal output line, on a side facing the corresponding top substrate.

3. The phase shifting apparatus according to claim 2 , wherein,

each of the top substrates is provided with at least one U-shaped line coupled to the at least one signal input line and the at least one phase-shift signal output line, on a side facing the corresponding bottom substrate.

4. The phase shifting apparatus according to claim 1 , wherein the phase shifting apparatus further comprises:

a fixing part for fixing the two top substrates in relation to each other, wherein the rod is coupled to the two top substrates via the fixing part.

5. The phase shifting apparatus according to claim 4 , wherein the fixing part comprises:

a first fastening piece and a second fastening piece that are configured to be fastened with each other, wherein the top substrates and the bottom substrates are attached when the first fastening piece is fastened to the second fastening piece.

6. The phase shifting apparatus according to claim 5 , wherein,

the first fastening piece is disposed with at least one rivet and at least one groove, and the second fastening piece is correspondingly disposed with at least one rivet and at least one groove, such that a fixed connection between the first fastening piece and the second fastening piece is formed by the matching between the rivets and the grooves.

7. The phase shifting apparatus according to claim 6 , wherein,

each of the top substrates is provided with at least two through-holes for allowing the rivets of the first and second fastening pieces to pass through; and

each of the bottom substrates is provided with at least one slot hole for providing a movement space for the rivets on the first and second fastening piece.

8. The phase shifting apparatus according to claim 1 , wherein, further comprising:

a plate-joint rivet for fixing the two bottom substrates to the grounding plate by passing the plate-joint rivet through a through-hole disposed on each of the bottom substrates and a through-hole disposed on the grounding plate.

9. The phase shifting apparatus according to claim 1 , wherein,

the bottom substrates and the top substrates are coated with an insulating layer except for a welding position.

10. The phase shifting apparatus according to claim 1 , wherein,

each of the bottom substrates is provided with one signal input line and three phase-shift signal output lines on a side facing the corresponding top substrate, wherein two of the three phase-shift signal output lines are connected via an external conductor.

11. The phase shifting apparatus according to claim 1 , wherein,

the fixing part and/or the plate-joint rivet are made of non-metallic material.

12. An electrically adjustable antenna, comprising:

the phase shifting apparatus according to claim 1 ; and

an antenna control unit coupled to the rod, wherein the antenna control unit is configured to drive the rod, such that the two top substrates slide simultaneously relative to the two bottom substrates.