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CN-224231954-U - Microwave magnetic field detector

CN224231954UCN 224231954 UCN224231954 UCN 224231954UCN-224231954-U

Abstract

The utility model relates to a microwave magnetic field detector which comprises a first grounding wire, a second grounding wire, a signal wire, a dielectric plate, a conducting layer and a detection ring. In the direction that the fourth end points to the third end, the distance between the outer side edge of the first end and the central axis of the signal line is controlled to be gradually reduced, and meanwhile, the distance between the outer side edge of the second end and the central axis of the signal line is controlled to be gradually reduced, so that on one hand, the end volume of the microwave magnetic field detector can be reduced, the contact and friction between the end of the microwave magnetic field detector and a non-planar sample are reduced, on the other hand, the common mode surface current excited by the induction magnetic field generated by the detection ring can be restrained, ring-like ripple and surge ripple of the detection ring in a middle-high frequency band are restrained, noise of the detection ring is reduced, and the detection precision is improved.

Inventors

  • ZHANG XUEFENG
  • PAN HONG
  • ZHAO RONGZHI

Assignees

  • 杭州电子科技大学

Dates

Publication Date
20260512
Application Date
20250718

Claims (10)

  1. 1. A microwave magnetic field detector, comprising: a first ground line (1), the first ground line (1) having a first end (11); -a second ground wire (2), the second ground wire (2) having a second end (21); a signal line (3), the signal line (3) having a third end (31) and a fourth end (32); The dielectric plate (4), the dielectric plate (4) has a first face and a second face, the first grounding wire (1), the signal wire (3) and the second grounding wire (2) are sequentially arranged side by side on the first face, so that the first end (11), the third end (31) and the second end (21) are sequentially arranged side by side, the signal wire (3) is arranged at intervals on the first grounding wire (1) and the second grounding wire (2), in the direction that the fourth end (32) points to the third end (31), the distance between the outer side edge of the first end (11) and the central axis of the signal wire (3) is gradually reduced, and the distance between the outer side edge of the second end (21) and the central axis of the signal wire (3) is gradually reduced; The conducting layer (5), the conducting layer (5) is arranged on the second surface, a through hole (41) is formed in the dielectric plate (4), and the first grounding wire (1) and the second grounding wire (2) are electrically connected to the conducting layer (5) through the through hole (41); And two ends of the detection ring (6) are respectively arranged on the first end part (11) and the third end part (31).
  2. 2. The microwave magnetic field detector according to claim 1, wherein a distance between the outer edge of the first end portion (11) and the central axis of the signal line (3) is d 1 , a distance between the outer edge of the second end portion (21) and the central axis of the signal line (3) is d 2 , and d 1 =d 2 is at the same position on the central axis of the signal line (3).
  3. 3. A microwave magnetic field detector according to claim 2, wherein d 1 and d 2 have a maximum value of 10mm and d 1 and d 2 have a minimum value of 5mm, the lengths of the first end portion (11) and the second end portion (21) in the direction of the central axis of the signal line (3) being 20mm.
  4. 4. A microwave magnetic field detector according to claim 3, wherein the profile of the outer edge of the first end portion (11) and the outer edge of the second end portion (21) are both straight.
  5. 5. A microwave magnetic field detector according to claim 1, characterized in that the outer edge of the first ground line (1) and the outer edge of the second ground line (2) coincide with the edge of the first face.
  6. 6. A microwave magnetic field detector according to claim 1, characterized in that the width of the third end (31) is gradually reduced in the direction in which the fourth end (32) points towards the third end (31).
  7. 7. A microwave magnetic field detector according to claim 6, wherein the third end (31) has a width d 3 ,d 3 maximum of 1.12mm and a d 3 minimum of 0.8mm, and the third end (31) has a length of 2.5mm.
  8. 8. A microwave magnetic field detector according to claim 6, wherein both side edges of the third end portion (31) are straight.
  9. 9. A microwave magnetic field detector according to claim 1, characterized in that the width of the fourth end (32) is gradually reduced in the direction in which the third end (31) points towards the fourth end (32).
  10. 10. The microwave magnetic field detector according to claim 9, wherein the fourth end (32) has a width d 4 ,d 4 maximum of 1.12mm and a d 4 minimum of 0.8mm, and the fourth end (32) has a length of 2.5mm.

Description

Microwave magnetic field detector Technical Field The utility model relates to the field of microwave magnetic field detection, in particular to a microwave magnetic field detector. Background With the continuous popularization of electronic products in modern society, the demand for integrated circuits is also increasing. On the other hand, however, some integrated circuits have a problem of too high microwave radiation, which impairs the physical health of the person. In view of the above problems, some of the prior art uses a near field probe to detect microwave radiation, and the near field probe can convert the detected microwave radiation into an electrical signal. The traditional near-field probe has the problems of large volume and low detection precision, and cannot well meet the higher and higher microwave radiation detection requirements. Disclosure of utility model Based on the above, it is necessary to provide a microwave magnetic field detector for solving the problems of large volume and low detection accuracy of the conventional near-field probe. A microwave magnetic field detector comprising: A first ground wire having a first end; a second ground wire having a second end; A signal line having a third end and a fourth end; The dielectric plate is provided with a first surface and a second surface, the first grounding wire, the signal wire and the second grounding wire are sequentially arranged on the first surface side by side, so that the first end part, the third end part and the second end part are sequentially arranged side by side, the signal wire is arranged between the first grounding wire and the second grounding wire, the distance between the outer side edge of the first end part and the central axis of the signal wire is gradually reduced in the direction that the fourth end part points to the third end part, and the distance between the outer side edge of the second end part and the central axis of the signal wire is gradually reduced; The conducting layer is arranged on the second surface, a through hole is formed in the dielectric plate, and the first grounding wire and the second grounding wire are electrically connected to the conducting layer through the through hole; And the two ends of the detection ring are respectively arranged on the first end part and the third end part. In some of these embodiments, the first end outer edge is spaced from the signal line central axis by d 1, and the second end outer edge is spaced from the signal line central axis by d 2, d 1=d2 at the same location on the signal line central axis. In some of these embodiments, d 1 and d 2 have a maximum of 10mm and d 1 and d 2 have a minimum of 5mm, and the first and second ends have a length of 20mm in the direction of the central axis of the signal line. In some of these embodiments, the first end outer edge and the second end outer edge are both straight lines. In some of these embodiments, the outer edge of the first ground line and the outer edge of the second ground line overlap an edge of the first face. In some of these embodiments, the width of the third end portion gradually decreases in a direction in which the fourth end portion points toward the third end portion. In some of these embodiments, the third end has a width d 3,d3 maximum of 1.12mm and a d 3 minimum of 0.8mm, and the third end has a length of 2.5mm. In some embodiments, the two side edges of the third end are both straight. In some of these embodiments, the width of the fourth end portion gradually decreases in a direction in which the third end portion points toward the fourth end portion. In some of these embodiments, the fourth end has a width d 4,d4 maximum of 1.12mm and a d 4 minimum of 0.8mm, and the fourth end has a length of 2.5mm. The beneficial effects of the utility model are as follows: In the direction that the fourth end points to the third end, the distance between the outer side edge of the first end and the central axis of the signal line is controlled to be gradually reduced, and meanwhile, the distance between the outer side edge of the second end and the central axis of the signal line is controlled to be gradually reduced, so that on one hand, the end volume of the microwave magnetic field detector can be reduced, the contact and friction between the end of the microwave magnetic field detector and a non-planar sample are reduced, on the other hand, the common mode surface current excited by the induction magnetic field generated by the detection ring can be restrained, ring-like ripple and surge ripple of the detection ring in a middle-high frequency band are restrained, noise of the detection ring is reduced, and the detection precision is improved. Moreover, the structural design can effectively reduce the excited higher order modes in the transmission process of the induction signals, inhibit the energy of the induction signals from being dispersed and lost all around, and enable the expected energy i