PCB type broadband television receiving antenna

Abstract

The utility model relates to a television receiving antenna. The PCB type broadband television receiving antenna comprises a PCB, the PCB comprises a base material layer and a copper foil layer, the copper foil layer comprises a capacitive oscillator located on the upper portion and two microstrip type inductive oscillators located on the lower portion, the length of the capacitive oscillator is 70%-85% of the total length of the two microstrip type inductive oscillators, and the length of the capacitive oscillator is 70%-85% of the total length of the two microstrip type inductive oscillators. The width of the capacitive oscillator is 1.0-1.2 times of the width of the microstrip type inductive oscillator, a first gap is reserved between the capacitive oscillator and the microstrip type line inductive oscillator, and the first gap is 15-25% of the width of the microstrip type inductive oscillator. After the structure is adopted, the reject ratio of the product is reduced by 50%, and meanwhile, the folding section is arranged on the outer side of the oscillator section, so that under the condition that the length of the antenna is reduced, better frequency bandwidth is realized by increasing the length of the capacitive oscillator, increasing capacitive distribution and optimizing parameters of the first gap and the second gap; impedance matching is formed between the two microstrip line inductive oscillators, and a signal is output through a feeding point. And the PCB is formed by etching, so that the cost is low and the processing is convenient.

Description

Technical Field

[0001] The utility model relates to a television receiving antenna. Background Art

[0002] The applicant disclosed a small-sized PCB wide-band television receiving antenna in the utility model with the application number: 201821389338.0 and the name: small-sized PCB wide-band television receiving antenna, which includes a PCB board. The PCB board includes a substrate layer and a copper foil layer. The copper foil layer includes a capacitive vibrator located in the upper part and two microstrip serpentine inductive vibrators located in the lower part. A set first gap is left between the capacitive vibrator and the microstrip serpentine inductive vibrators. The two microstrip serpentine inductive vibrators are symmetrically arranged below the capacitive vibrator. A set second gap is left between the two microstrip serpentine inductive vibrators. A trapezoidal boss is provided below the capacitive vibrator. The microstrip serpentine inductive vibrator is sequentially provided with a serpentine section, a vibrator section and an output section from outside to inside, and a feeding point is provided on the output section. After adopting this scheme, the PCB size is small, but the wiring is complex and the production yield is low. Content of the Utility Model

[0003] In order to solve the deficiencies existing in the prior art, the utility model provides a television receiving antenna with a small volume and convenient for processing.

[0004] A PCB wide-band television receiving antenna in the utility model includes a PCB board. The PCB board includes a substrate layer and a copper foil layer. The copper foil layer includes a capacitive vibrator located in the upper part and two microstrip inductive vibrators located in the lower part. The length of the capacitive vibrator is 70% - 85% of the total length of the two microstrip inductive vibrators. The width of the capacitive vibrator is 1.0 - 1.2 times the width of the microstrip inductive vibrator. A set first gap is left between the capacitive vibrator and the microstrip inductive vibrators. The first gap is 15% - 25% of the width of the microstrip inductive vibrator. The two microstrip inductive vibrators are symmetrically arranged below the capacitive vibrator. A set second gap is left between the two microstrip inductive vibrators. The second gap is 75% - 95% of the width of the microstrip inductive vibrator. A trapezoidal boss is provided below the capacitive vibrator. A feeding point is provided inside the microstrip inductive vibrator. A concave structure is provided at the corresponding position of the trapezoidal boss on the inner side of the upper part of the microstrip inductive vibrator. The microstrip inductive vibrator is sequentially provided with a folded section, a vibrator section and an output section from outside to inside. The vibrator section is linear, and a feeding point is provided on the output section. After adopting this structure, the product defective rate is reduced by 50%. At the same time, by providing a folded section on the outer side of the vibrator section, while reducing the antenna length, combined with increasing the length of the capacitive vibrator, increasing the capacitive distribution, and optimizing the parameters of the first gap and the second gap, a better frequency bandwidth is achieved. An impedance match is formed between the two microstrip inductive vibrators, and the signal is output through the feeding point. The PCB board is formed by etching, with low cost and convenient for processing.

[0005] Preferably, the length of the capacitive oscillator is 75% of the total length of the two microstrip inductive oscillators. The width of the capacitive oscillator is 1.05 times the width of the microstrip inductive oscillator. The first gap is 20% of the width of the microstrip inductive oscillator. The second gap is 80% of the width of the microstrip inductive oscillator, with good reception effect and convenient use.

[0006] The beneficial effects of the present utility model: By providing a folded section outside the oscillator section, when the antenna length is reduced, by increasing the length of the capacitive oscillator, increasing the capacitive distribution, and optimizing the parameters of the first gap and the second gap, a better frequency bandwidth is achieved. Description of the Drawings

[0007] Figure 1 It is a schematic structural diagram of a small-sized PCB wideband television receiving antenna.

[0008] Markings in the figure: 1. Capacitive oscillator, 2. Microstrip inductive oscillator, 3. Feeding point, 21. Folded section, 22. Oscillator section, 23. Output section. Detailed Embodiments

[0009] The following further describes the present utility model in detail with reference to the drawings, but it should not be understood that the scope of the above-mentioned subject matter of the present utility model is limited to the above embodiments.

[0010] As Figure 1 shown, a PCB wideband television receiving antenna includes a PCB board, the PCB board includes a substrate layer and a copper foil layer, the copper foil layer includes a capacitive oscillator 1 located in the upper part and two microstrip inductive oscillators 2 located in the lower part. The length of the capacitive oscillator 1 is 70% - 85% of the total length of the two microstrip inductive oscillators 2. The width of the capacitive oscillator 1 is 1.0 - 1.2 times the width of the microstrip inductive oscillator. A set first gap is left between the capacitive oscillator 1 and the microstrip inductive oscillator 2, and the first gap is 15% - 25% of the width of the microstrip inductive oscillator. The two microstrip inductive oscillators 2 are symmetrically arranged below the capacitive oscillator 1. A set second gap is left between the two microstrip inductive oscillators 2, and the second gap is 75% - 95% of the width of the microstrip inductive oscillator. A trapezoidal boss is provided below the capacitive oscillator 1. A feeding point 3 is provided inside the microstrip inductive oscillator 2. A concave structure is provided at the corresponding position of the trapezoidal boss on the inner side of the upper part of the microstrip inductive oscillator 2. The microstrip inductive oscillator 2 is successively provided with a folded section 21, an oscillator section 22, and an output section 23 from outside to inside. The oscillator section is a straight line, and a feeding point 3 is provided on the output section 23. By providing a folded section 21 outside the oscillator section 22, when the antenna length is reduced, by increasing the length of the capacitive oscillator 1, increasing the capacitive distribution, and optimizing the parameters of the first gap and the second gap, a better frequency bandwidth is achieved; an impedance match is formed between the two microstrip inductive oscillators 2, and the signal is output through the feeding point 3. The PCB board is formed by etching, with low cost and convenient processing.

[0011] The shortening coefficient of the oscillator is increased by the dielectric constant of the PCB substrate to achieve the purpose of reducing the antenna oscillator; and the length of the low-end resonant oscillator is shortened by using a microstrip serpentine inductive oscillator to achieve the purpose of reducing the antenna oscillator.

[0012] The antenna design is implemented by etching on a PCB substrate; the 1 / 2λ capacitive oscillator 1 and the microstrip serpentine inductive oscillator 2 form a receiving antenna; the signal is output through the feeding point 3.

[0013] The capacitive oscillator 1 resonates at the high end of the receiving frequency band, and the microstrip serpentine inductive oscillator 2 resonates at the low end of the receiving frequency band. The gap between the two oscillators forms impedance matching, and the signal is output through the feeding point 3.

Claims

1. A PCB type broadband television receiving antenna, comprising a PCB board, the PCB board comprising a substrate layer and a copper foil layer, the copper foil layer comprising a capacitive vibrator located at an upper portion and two microstrip inductive vibrators located at a lower portion, the length of the capacitive vibrator being 70% to 85% of the total length of the two microstrip inductive vibrators, the width of the capacitive vibrator being 1.0 to 1.2 times the width of the microstrip inductive vibrator, a first gap being set between the capacitive vibrator and the microstrip linear inductive vibrator, the first gap being 15% to 25% of the width of the microstrip inductive vibrator %, two microstrip linear inductive oscillators are symmetrically arranged at the bottom of the capacitive oscillator, a set second gap is left between the two microstrip linear inductive oscillators, the second gap is 75%~95% of the width of the microstrip inductive oscillator, a trapezoidal boss is provided at the bottom of the capacitive oscillator, a feeding point is provided on the inner side of the microstrip linear inductive oscillator, a concave structure is provided on the inner side of the upper part of the microstrip linear inductive oscillator at the position corresponding to the trapezoidal boss, the microstrip linear inductive oscillator is provided with a folded section, a oscillator section and an output section from the outside to the inside, the oscillator section is a straight line, and a feeding point is provided on the output section.

2. A PCB type broadband television receiving antenna according to claim 1, characterized in that: The length of the capacitive oscillator is 75% of the total length of the two microstrip inductive oscillators.

3. The PCB type broadband television receiving antenna according to claim 1, characterized in that: The width of the capacitive oscillator is 1.05 times the width of the microstrip inductive oscillator.

4. The PCB type broadband television receiving antenna according to claim 1, characterized in that: The first gap is 20% of the width of the microstrip inductive oscillator.

5. The PCB type broadband television receiving antenna according to claim 1, characterized in that: The second gap is 80% of the width of the microstrip inductive vibrator.

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