Package antenna measurement system and package antenna measurement fixture

Abstract

The present invention relates to an antenna measurement fixture, comprising a packaged antenna bearing unit and a metal clip. The packaged antenna bearing unit comprises a metal plate and an annular support structure. The metal plate comprises an upper surface, a lower surface and a radio frequency through hole. The annular support structure extends from the radio frequency through hole of the metal plate. The annular support structure is used to support the edge of the packaged antenna to prevent the packaged antenna from falling from the radio frequency through hole. The metal clip is used to electrically connect the metal plate and the grounding surface of the packaged antenna, and the upper surface of the metal plate, the lower surface of the metal plate, the grounding surface of the packaged antenna and the radiating metal surface of the packaged antenna are arranged in sequence along a straight line. The grounding surface of the packaged antenna and the metal plate are connected by the metal clip, so that the high-density surface current on the grounding surface of the packaged antenna is dispersed to the metal plate, and the radiation field strength corresponding to the low-density surface current is also low, thereby reducing the interference of the back and side radiation on the forward radiation wave generated by the radiating metal surface.

Description

Technical Field

[0001] The present invention relates to a system and a fixture, and in particular to a packaged antenna measurement system and a fixture.

[0002] Backstage Technology

[0003] Figure 1 The invention is a package antenna measurement fixture of the prior art, comprising a package antenna carrying fixture 1 and a needle platform 2.

[0004] The package antenna support fixture 1 is a foam material, including a through hole 11, a lower surface 12 and an upper surface 13. The through hole 11 is wide at the top and narrow at the bottom. The package antenna 3 is inserted into the through hole 11 from top to bottom and is stuck. The package antenna 3 includes a grounding metal surface 31 and a radiating metal surface 32. The radiating metal surface 32 is located below the grounding metal surface 31.

[0005] The disadvantages of this prior art package antenna measurement fixture are:

[0006] (1) Since the packaged antenna 3 is smaller than the non-packaged antenna, the narrow grounded metal surface 31 gathers high-density surface current, which in turn causes back and side radiation 33. The measurement of the packaged antenna 3 must use the test needle 21 of the probe 2 to touch the signal feed point 34 coplanar with the grounded metal surface 31. In order to meet the positioning requirements of most measurements, the current commercially available probes 2 are designed to have a lower surface 22 parallel to the ground so that the lower surface 22 of the probe 2 can be flatly attached to the packaged antenna supporting fixture 1. The back and side radiation 33 of the packaged antenna 3 are easily reflected after hitting the lower surface 22 of the probe 2 due to the angle and then penetrate the foamed material of the packaged antenna supporting fixture 1 to interfere with the forward radiation wave 35 generated by the radiating metal surface 32, resulting in measurement errors.

[0007] Figure 2 The radiation pattern of the package antenna 3 in the YZ half plane is simulated by electromagnetic simulation software with and without the pin base 2. The radiation pattern with the pin base 2 is marked as a solid line, and the radiation pattern without the pin base 2 is marked as a dotted line. 0 degrees is the direction Z (marked downward in the figure), 90 degrees is the direction Y (marked right in the figure), and -90 degrees is the direction -Y (left in the figure). Figure 2 It can be verified that the presence of the needle station 2 will indeed cause the radiation field pattern to have more fluctuations relative to the lumped port input.

[0008] In summary, the present invention redesigns the packaged antenna supporting fixture 1 to reduce the back and side radiation 33, and redesigns the shape of the pin stage 2 so that the back and side radiation 33 incident on the pin stage 2 are reflected away from the area of ​​the forward radiation wave 35, thereby solving the problems of the prior art. Summary of the invention

[0009] In order to solve the problems in the prior art, the present invention proposes a packaged antenna measurement system.

[0010] The packaged antenna measurement system of the present invention comprises a packaged antenna measurement fixture, a needle table, a radiation field type measurement unit and a shielding box.

[0011] The packaged antenna measurement fixture includes a packaged antenna bearing unit and a metal clip. The packaged antenna bearing unit includes a metal plate and an annular support structure. The metal plate includes an upper surface, a lower surface and an RF through hole. The annular support structure extends from the RF through hole of the metal plate. When the packaged antenna is inserted from the RF through hole, the annular support structure supports the edge of the packaged antenna to prevent the packaged antenna from falling. The metal clip is used to electrically connect the metal plate and the ground plane of the packaged antenna, and the upper surface of the metal plate, the lower surface of the metal plate, the ground plane of the packaged antenna, and the radiating metal surface of the packaged antenna are arranged in sequence along a straight line.

[0012] Preferably, the metal clip includes a fixed end and a contact end. The fixed end is connected to the metal plate, and when the packaged antenna is placed on the annular support structure, the contact end presses the ground plane of the packaged antenna to make the ground plane of the packaged antenna electrically conductive with the metal plate.

[0013] Preferably, the metal clip is an S-shaped spring.

[0014] The needle stage includes a feeding needle and a needle seat. The feeding needle is used to contact the feeding point of the package antenna to transmit signals, and the needle seat is used to fix and link the feeding needle. When the feeding needle touches the package antenna for measurement, the overlapping parallel extension surface of the needle seat adjacent to the bottom surface of the metal plate at least forms an acute angle of more than 20 degrees with the overlapping parallel extension surface of the upper surface of the metal plate.

[0015] The radiation pattern measurement unit is used to measure the radiation pattern of the packaged antenna.

[0016] Preferably, the radiation pattern measuring unit adopts direct far field measurement (DFF) to measure the radiation pattern of the packaged antenna.

[0017] Preferably, the radiation pattern measuring unit measures the radiation pattern of the packaged antenna using a CATR (Collapsed Area Telescope) method.

[0018] The shielding box is connected to the metal plate of the packaged antenna bearing unit, and the radiation metal surface of the packaged antenna placed on the annular support structure faces the shielding box. The radiation field type measurement unit is arranged in the shielding box.

[0019] The effects of the present invention are:

[0020] (1) A metal clip is used to electrically connect the ground plane of the packaged antenna to the metal plate, so that the surface current with a small area and high density on the ground plane of the packaged antenna is dispersed to the relatively large area of ​​the metal plate through the metal clip. The radiation field strength corresponding to the low-density surface current is also low, thereby weakening the back and side radiation from the source; and (2) The needle holder is redesigned so that the back and side radiation reflected by the needle holder propagate in directions other than the forward radiation wave, thereby reducing the interference introduced by the needle holder, thereby solving the problems of the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of a packaged antenna measurement fixture in the prior art.

[0022] Figure 2 It simulates the radiation pattern of the packaged antenna with and without a pin platform.

[0023] Figure 3 FIG. 4 is a schematic diagram of a first preferred embodiment of a packaged antenna measurement system of the present invention.

[0024] Figure 4 It is a schematic diagram of a preferred embodiment of the packaged antenna measurement fixture of the present invention.

[0025] Figure 5 Schematic diagram of the packaged antenna measuring fixture and the needle table of the present invention.

[0026] Figure 6 FIG. 4 is a schematic diagram of a second preferred embodiment of a packaged antenna measurement system of the present invention. DETAILED DESCRIPTION

[0027] Figure 3 is a schematic diagram of a first preferred embodiment of the packaged antenna measurement system of the present invention, Figure 4 is a schematic diagram of a preferred embodiment of a packaged antenna measurement fixture of the present invention, wherein a first preferred embodiment of a packaged antenna measurement system of the present invention includes a preferred embodiment of the packaged antenna measurement fixture.

[0028] See also Figure 3 and Figure 4 A first preferred embodiment of the package antenna measurement system of the present invention includes a package antenna measurement fixture 4, a needle table 5, a radiation field measurement unit 6 and a shielding box 7.

[0029] The package antenna measurement fixture 4 includes a package antenna carrying unit 41 and a metal clamp 42. The package antenna carrying unit 41 includes a metal plate 411 and an annular support structure 412. The metal plate 411 includes an upper surface 4111, a lower surface 4112 and an RF through hole 4113. The annular support structure 412 extends from the RF through hole 4113 of the metal plate 411. When the package antenna 8 is inserted from the RF through hole 4113, the annular support structure 412 supports the edge of the package antenna 8 to prevent the package antenna 8 from falling. The metal clip 42 is used to electrically connect the metal plate 411 and the ground plane 81 of the packaged antenna 8, and the upper surface 4111 of the metal plate 411, the lower surface 4112 of the metal plate 411, the ground plane 81 of the packaged antenna 8, and the radiating metal surface 82 of the packaged antenna 8 are arranged in sequence from top to bottom along a straight line direction Z. The advantage of such an arrangement is that the lower surface 4112 will not be too close to the radiating metal surface 82 of the packaged antenna 8, and the interference of the metal plate 411 on the forward radiation 83 of the radiating metal surface 82 can also be reduced.

[0030] The metal clip 42 is an S-shaped spring and includes a fixed end 421 and a contact end 422. The fixed end 421 is connected to the metal plate 411. When the packaged antenna 8 is placed on the annular support structure 412, the contact end 422 presses the ground plane 81 of the packaged antenna 8, so that the ground plane 81 of the packaged antenna 8 is electrically connected to the metal plate 411.

[0031] See also Figure 4 and Figure 5 The needle stage 5 includes a feeding needle 51 and a needle seat 52. The feeding needle 51 is used to contact the feeding point 821 of the package antenna 8 to transmit signals, and the needle seat 52 is used to fix and link the feeding needle 51. When the feeding needle 51 touches the feeding point 821 of the package antenna 8 for measurement, the overlapping parallel extension surface of the needle seat 52 adjacent to the bottom surface 521 of the metal plate 411 at least forms an acute angle θ of more than 20 degrees with the overlapping parallel extension surface of the upper surface 4111 of the metal plate 411, so as to Figure 3 As shown, the interference of the needle seat 52 to the package antenna 8 is reduced, and the electromagnetic waves incident on the needle seat 52 are reflected to an area deviating from the package antenna 8.

[0032] See also Figure 3 The radiation pattern measuring unit 6 is used to measure the radiation pattern of the packaged antenna 8. In this preferred embodiment, the radiation pattern measuring unit 6 uses a CATR to measure the YZ plane radiation pattern of the packaged antenna 8. The shielding box 7 is connected to the metal plate 411 of the packaged antenna bearing unit 41, and the radiation metal surface 82 of the packaged antenna 8 placed on the annular support structure 412 faces the shielding box 7, and the radiation pattern measuring unit 6 is arranged in the shielding box 7.

[0033] Figure 61 is a schematic diagram of a second preferred embodiment of the package antenna measurement system of the present invention. The second preferred embodiment is similar to the first preferred embodiment, except that the radiation pattern measurement unit 6 measures the radiation pattern of the package antenna 8 using direct far field (DFF).

[0034] The beneficial effects of the present invention are:

[0035] (1) The metal clip 42 is used to electrically connect the ground plane 81 of the packaged antenna 8 to the metal plate 411, so that the surface current with a small area and high density on the ground plane 81 of the packaged antenna 8 is dispersed to the relatively large area of ​​the metal plate 411 through the metal clip 42, and the radiation field intensity corresponding to the low-density surface current is also low, thereby weakening the back and side radiation from the source; and (2) The needle seat 52 is redesigned so that the back and side radiation reflected by the needle seat 52 propagates in other directions away from the forward radiation 83, thereby reducing the interference introduced by the needle seat 52, thereby improving the performance of the antenna. Figure 3 The accuracy of the YZ plane radiation pattern is shown.

[0036] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention.

[0037] Reference numerals

[0038] 1 Package antenna support fixture

[0039] 11 Through hole

[0040] 12 Lower surface

[0041] 13 Upper surface

[0042] 2 Needle Station

[0043] 21 Test pin

[0044] 22 Lower surface

[0045] 3 Package Antenna

[0046] 31 Grounded metal surface

[0047] 32 Radiating Metal Surface

[0048] 33 Back and side radiation

[0049] 34 Signal feed point

[0050] 35 Forward radiating waves

[0051] 4 Package antenna measurement fixture

[0052] 41 Package antenna carrier unit

[0053] 411 Metal Plate

[0054] 4111 Upper surface

[0055] 4112 Lower surface

[0056] 4113 RF Through Hole

[0057] 412 Ring support structure

[0058] 42 Metal Clip

[0059] 421 Fixed end

[0060] 422 Contact end

[0061] 5 Needle Station

[0062] 51 Feed pin

[0063] 52 Needle Seat

[0064] 521 Bottom

[0065] 6 Radiation field measurement unit

[0066] 7 Shielding box

[0067] 8 Package Antenna

[0068] 81 Ground plane

[0069] 82 Radiating Metal Surface

[0070] 821 Feed Point

[0071] 83 Forward Radiation

[0072] Z Line Direction

[0073] θ acute angle.

Claims

1. A package antenna measurement fixture, comprising: A packaged antenna bearing unit includes a metal plate and a ring-shaped supporting structure. The metal plate includes an upper surface, a lower surface, and a radio frequency through hole. The annular support structure extends out from the RF through hole of the metal plate. When a packaged antenna is inserted through the RF through hole, the annular support structure supports the edge of the packaged antenna from bottom to top to prevent the packaged antenna from falling. and a metal clip for electrically connecting the metal plate and a ground plane of the packaged antenna, Furthermore, the upper surface of the metal plate, the lower surface of the metal plate, the ground plane of the packaged antenna, and a radiation metal surface of the packaged antenna are arranged in sequence along a straight line.

2. The package antenna measurement fixture as claimed in claim 1, characterized in that: Also includes: A needle platform includes a feeding needle and a needle seat. The feeding needle is used to contact a feeding point of the packaged antenna to transmit a signal. The needle seat is used to fix and link the feeding needle. When the feeding needle touches the feeding point for measurement, the overlapping parallel extension surface of the needle seat adjacent to a bottom surface of the metal plate and the overlapping parallel extension surface of the upper surface of the metal plate form an acute angle of more than 20 degrees.

3. The package antenna measurement fixture as claimed in claim 1, characterized in that: The metal clip includes a fixed end and a contact end, the fixed end is connected to the metal plate, and when the packaged antenna is placed on the annular support structure, the contact end presses the ground plane of the packaged antenna to make the ground plane of the packaged antenna electrically connected to the metal plate.

4. The package antenna measurement fixture as claimed in claim 3, characterized in that: The metal clip is an S-shaped spring.

5. A package antenna measurement system, comprising: A packaged antenna bearing unit, comprising a metal plate and an annular support structure, wherein the metal plate comprises an upper surface, a lower surface, and a radio frequency through hole, and the annular support structure extends out from the radio frequency through hole of the metal plate. When a packaged antenna is placed through the radio frequency through hole, the annular support structure supports the edge of the packaged antenna to prevent the packaged antenna from falling; a metal clip for electrically connecting the metal plate and a ground plane of the packaged antenna, wherein the upper surface of the metal plate, the lower surface of the metal plate, the ground plane of the packaged antenna, and a radiating metal surface of the packaged antenna are arranged in sequence along a straight line; a needle stage, comprising a feeding needle and a needle seat, wherein the feeding needle is used to contact a feeding point of the package antenna to transmit a signal, and the needle seat is used to fix and link the feeding needle, and when the feeding needle touches the package antenna for measurement, the overlapping parallel extension surface of the needle seat adjacent to a bottom surface of the metal plate at least forms an acute angle of more than 20 degrees with the overlapping parallel extension surface of the upper surface of the metal plate; and A radiation pattern measuring unit is used to measure a radiation pattern of the packaged antenna.

6. The package antenna measurement system according to claim 5, wherein: The radiation pattern measuring unit measures the radiation pattern of the packaged antenna by directly measuring the radiation pattern in the far field.

7. The package antenna measurement system as claimed in claim 5, characterized in that: The radiation pattern measuring unit measures the radiation pattern of the packaged antenna using a reduced-range field.

8. The package antenna measurement system as claimed in claim 5, characterized in that: Also includes: A shielding box is connected to the metal plate of the packaged antenna bearing unit, and the radiation metal surface of the packaged antenna placed on the annular support structure faces the shielding box. The radiation field type measurement unit is arranged in the shielding box.

9. The package antenna measurement system according to claim 5, wherein: The metal clip includes a fixed end and a contact end, the fixed end is connected to the metal plate, and when the packaged antenna is placed on the annular support structure, the contact end presses the ground plane of the packaged antenna to make the ground plane of the packaged antenna electrically connected to the metal plate.

10. The package antenna measurement system according to claim 9, wherein: The metal clip is an S-shaped spring.

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