TWM461887U - Am/Fm power line antenna - Google Patents

Description

AM/FM power line antenna

The present invention provides an AM/FM power line antenna, especially a rear end power line having a rear end inductor filtering power supply part of the noise surge, and extending from the rear end inductor to the front end of the antenna end. The tuning inductor adjusts the resonant frequency and bandwidth of the antenna to assist in adjusting the impedance matching, thereby improving the overall signal reception.

According to the current situation, the standard of living in society is rapidly increasing. The requirements for clothing, food, housing, travel and entertainment in life and work are getting higher and higher, and the practicality is getting better and better. In terms of line, in addition to the common In addition to automobiles, a variety of buses, trucks, trucks, etc., have become increasingly popular with the needs of the work and the public's advocacy of leisure travel, and have become an indispensable means of transport for modern people.

Moreover, with the popularization of the above-mentioned vehicles, the listeners have the habit of listening to radio stations through radios, car stereos and other electronic devices in the car, and the traffic jams on weekdays and commutes during peak hours are more serious, which greatly increases the audience. The opportunity to listen to radio stations, such as listening to live traffic information, music, news of the day, leisure and entertainment information, etc., provides the driver with considerable convenience and meets the information needs of many aspects.

However, at present, electronic devices such as car radios and car audio systems generally have two amplitude modulation (AM) and frequency modulation (FM) frequency bands, and all of them will pass through the sky when listening to radio stations. The line receives the AM/FM broadcast signal, and after filtering and amplifying, it can be converted into sound wave broadcast by the speaker or the earphone, and the AM/FM broadcast signal is in the form of continuous uninterrupted electromagnetic wave (ie analog signal). Transmission is easy to be affected by clutter interference, so the antenna receiving quality plays a key role. The car antennas generally used in automobiles can be mainly divided into built-in antennas and external antennas, and can be divided into glass-type and rod according to the installation type. Type, suction cup or suction top type, thread type, card edge type, etc., the wire can be arranged on the windshield of the car as an antenna, or the rod antenna of the car roof and the fin antenna can be used as an antenna for receiving signals. However, the conventional antennas need to be separately designed with AM/FM antennas, which not only occupy a certain volume and space, but also cause cumbersome and inconvenient installation, thereby making the overall assembly man-hour and cost not effectively reduced, and because of the conventional antenna and radio The amplifiers inside the electronic equipment such as car audio are designed separately, which causes the feeder connection required for the conventional antenna to be long and the cost is increased. Thing this industry, re-designed to be effectively addressed.

Therefore, the new creators have designed and developed such AM/FM power line antennas because of the problems and shortcomings of the conventional antennas, and the collection of relevant materials through multi-party evaluation and consideration, and the continuous trial and modification of the years of research and development experience in this industry. A new type is born.

The main purpose of this creation is that one end of the rear power cable has a connector connected to the vehicle power supply, and the front antenna is extended at the other end of the rear power supply line, and the front antenna is opposite to the rear end inductance. The bottom end is provided with a tuning inductor, and the bottom tuning inductor is provided with an antenna amplifier at the other end of the front antenna, and then the connector of the signal transmission feeder extending from the antenna amplifier is connected to the input port of the radio, and the back end can be The inductor filters out the noise surge in the power supply section and isolates the back-end power line from the front-end antenna to reduce the front-end power line pair The effect of the end antenna, and adjusting the resonant frequency and bandwidth of the antenna by adjusting the length of the front antenna and the inductance of the bottom tuning inductor, assisting in adjusting the impedance matching, and then transmitting the AM/FM wireless received by the front antenna through the signal transmission feeder. The signal is transmitted to the radio and has a good radio function, which improves the overall signal reception.

The second purpose of this creation is to mount the housing on the antenna amplifier to the rear of the radio inside the vehicle body or under the instrument panel, and to connect the connector of the rear power cable to the vehicle power supply to provide 9~16V output voltage. The signal transmission feeder connector is connected to the input port of the radio to receive the AM/FM wireless signal and has a radio function, which can directly integrate the back end power line and the front end antenna to reduce the occupation of the vehicle body. The internal volume and space can effectively reduce the cumbersome and inconvenient installation caused by the separate design of the front antenna and the antenna amplifier, and shorten the length of the signal transmission feeder, thereby achieving a simple structure, easy assembly and low cost. The effect.

Another purpose of this creation is that the front-end antenna is an antenna amplifier that can amplify and adjust the AM/FM wireless signal to match the input and output, and the bottom-end loading method is used at the input end of the antenna amplifier to improve the bandwidth of the front-end antenna and assist in adjustment. The antenna amplifier is impedance matched to the front end antenna for greater bandwidth and better impedance matching.

Another object of the present invention is that an FM input filter matching circuit and an AM input filter matching circuit are provided on the circuit board of the antenna amplifier, and an FM input circuit and an AM input filter matching circuit are respectively connected with an FM amplifying circuit and AM amplification circuit, and FM amplification circuit and AM amplification circuit are respectively connected with FM output filter matching circuit and AM output filter matching circuit, and then FM output filter matching circuit, AM output filter matching circuit is connected in parallel with a power supply filter circuit, and FM input filter Matching circuit and AM input filter matching The input end of the circuit has an electrostatic protector in parallel, and an electrostatic protector is also connected in parallel with the output end of the FM output filter matching circuit and the AM output filter matching circuit, and the front end antenna and the FM input filter matching circuit and the AM input filter matching circuit are There is a filter blocking capacitor in series to prevent the DC power of the power supply filter circuit from directly entering the FM input filter matching circuit and the AM input filter matching circuit, reducing the influence of the power supply voltage on the circuit, and helping to filter out the noise of the power supply part. Surge.

1‧‧‧Back power cord

11‧‧‧Connector

12‧‧‧ wire

2‧‧‧Back end inductance

21‧‧‧Bolt magnet

22‧‧‧ coil

23‧‧‧Heat shrink sleeve

3‧‧‧ front antenna

31‧‧‧ wire

4‧‧‧Bottom tuning inductor

41‧‧‧Bolt magnet

42‧‧‧ coil

43‧‧‧Heat shrink sleeve

5‧‧‧Antenna Amplifier

50‧‧‧shell

501‧‧‧ fixed board

51‧‧‧ boards

511‧‧‧FM input filter matching circuit

512‧‧‧AM input filter matching circuit

513‧‧‧FM amplifying circuit

514‧‧‧AM amplifier circuit

515‧‧‧FM output filter matching circuit

516‧‧‧AM output filter matching circuit

517‧‧‧Power supply filter circuit

518‧‧‧Electrostatic protector

519‧‧‧Filter DC blocking capacitor

6‧‧‧Signal transmission feeder

61‧‧‧Connectors

The first picture is a three-dimensional appearance of the creation.

The second picture is a three-dimensional exploded view of the creation.

The third diagram is a circuit diagram of the proposed antenna amplifier.

The fourth picture is the standing wave ratio measurement of the creation.

The fifth figure is the impedance measurement map of the creation.

The sixth figure is the return loss measurement map of this creation.

In order to achieve the above objectives and effects, the technical means and its construction adopted in the present invention are described in detail in the preferred embodiment of the present invention, and the structure and function are as follows.

Please refer to the first, second and third figures, which are respectively the three-dimensional appearance drawing, the three-dimensional exploded view and the circuit diagram of the antenna amplifier. It can be clearly seen from the figure that the creation includes the rear power supply line 1. a back end inductor 2, a front end antenna 3, a bottom end tuning inductor 4, an antenna amplifier 5, and a signal transmission feed line 6, wherein the rear end power line 1 has a connector 11 at one end thereof. And a single-core or multi-core wire 12 is extended from the connector 11, and the wire 12 is provided with a rear-end inductor 2 at the other end of the connector 11, and the rear-end inductor 2 has a magnetic core, a silicon steel sheet or a magnetic conductor 21 composed of other magnetic materials, and a coil 22 formed by a predetermined number of turns 12 is directly wound around the magnetizer 21, and the coil 22 of the rear end inductor 2 also extends out of the front end antenna 3 having a single core or Multi-core wire 31.

Furthermore, the front end antenna 3 is provided with a bottom tuning inductor 4 at the other end of the back end inductor 2, and the bottom end tuning inductor 4 also has a magnetizer 41 which can be a magnetic core, a silicon steel sheet or other magnetic material. And a coil 42 formed by a predetermined number of wires 31 is directly wound around the magnet 41, and the coil 42 is provided with an antenna amplifier 5 at the other end of the front antenna 3, and the signal of the connector 61 is extended by the antenna amplifier 5. The feed line 6 is transmitted, and the joint 61 can be various types of radio frequency (RF) joints.

However, after the creation, the terminal inductor 2 is preferably implemented as a core inductor, and the inductance may be 8 uH or more, and the noise surge mainly used to filter the power supply portion enters the front antenna 3 through the rear power line 1 . The antenna amplifier 5 affects the overall sound collection effect, and the back end power line 1 and the front end antenna 3 can be isolated to reduce the influence of the back end power line 1 on the front end antenna 3, and the inductance of the bottom end tuning inductor 4 It can be between 100~500nH, and the inductance can be adjusted by changing the number of coils of the coil 42 and the material of the magnet 41. When the inductance required for tuning the inductor 4 at the bottom is small, the magnet can be directly removed. In order to reduce the inductance, and the back end inductor 2 and the bottom end tuning inductor 4 are actually used, a heat shrink sleeve 23, 43 may be respectively wrapped around the coils 22 and 42 to avoid the back end inductance 2. The bottom end tuned the inductance 4 to damage or damage the structure caused by the collision with the vehicle body, and can prevent the short circuit caused by the back end inductance 2, the bottom tuning inductor 4 and the vehicle body contacting each other.

In addition, the length of the front antenna 3 can be preferably 300 mm or more, and the front antenna 3 can adjust the length of the front antenna 3 and the inductance of the bottom tuning inductor 4 through the antenna theory to adjust the resonant frequency and bandwidth of the center. Therefore, the front antenna 3 can be adjusted according to the actual required resonant frequency and the electrical parameters such as bandwidth and impedance matching to determine the most suitable length of the front antenna 3, and the antenna amplifier 5 can receive the front antenna 3. The weak AM (amplitude modulation) / FM (frequency modulation) wireless signal is amplified and output through the connector 61 at the end of the signal transmission feed line 6.

The antenna amplifier 5 is a circuit board 51 including a housing 50 and an inner portion of the housing 50. The circuit board 51 is provided with an FM input filter matching circuit 511 and an AM input filter matching circuit 512 that can be connected in parallel with the front end antenna 3. The FM input filter matching circuit 511 and the AM input filter matching circuit 512 are respectively connected with an FM amplifying circuit 513 and an AM amplifying circuit 514, and each of the FM amplifying circuit 513 and the AM amplifying circuit 514 is respectively connected to the signal transmitting feeder 6. The FM output filter matching circuit 515 and the AM output filter matching circuit 516 are further connected by the FM output filter matching circuit 515 and the AM output filter matching circuit 516 with a power supply filter circuit 517 connectable to the back end power line 1, and the FM input filter The input end of the matching circuit 511 and the AM input filter matching circuit 512 is electrostatically protected by an electrostatic protector 518 in parallel, and an electrostatic protector is also connected in parallel with the output of the FM output filter matching circuit 515 and the AM output filter matching circuit 516. 518 electrostatically protects the circuit to suppress abnormal voltage, noise and electromagnetic interference, and the front end antenna 3 and the FM input filter matching circuit 511, AM A filter blocking capacitor 519 is connected in series between the input filter matching circuit 512 to prevent the direct current of the power supply filter circuit 517 from directly entering the FM input filter matching circuit 511 and A. In the M input filter matching circuit 512, the influence of the power supply voltage of the power supply filter circuit 517 on the circuit is reduced, and the noise surge of the power supply portion is filtered.

The AM/FM power line antenna of the present invention can be used in an automobile, a bus, a truck body or other vehicles, and the housing 50 of the antenna amplifier 5 can be combined with the radio inside the vehicle body by using the fixing plate 501. The rear end, the underside of the instrument panel or other suitable position, and the connector 11 of the rear power cord 1 can be connected to the socket of any position of the vehicle power source by plugging, and the socket of the vehicle power supply provides 9~16V. The output voltage, and the connector 61 of the signal transmission feeder 6 is connected to the input port of the radio by plugging to receive the AM/FM wireless signal, and has the function of collecting the sound, and the back end power line 1 and the front end antenna can be connected. 3 Direct integration into one to reduce the volume and space occupied by the interior of the car body, and can effectively reduce the cumbersome and inconvenient installation work of the separate front end antenna 3 and the antenna amplifier 5 due to the separate design, and can shorten the signal transmission feeder The length of use of 6, to achieve the effect of simple structure, easy assembly and lower production cost.

When the creation is in use, the connector 11 of the rear power cord 1 is first powered for the vehicle power supply connected to the interior of the vehicle body, and the back end inductor 2 filters out the noise surge of the power supply portion. The back end power line 1 is isolated from the front end antenna 3 through the back end inductor 2 to reduce the influence of the length of the back end power line 1 on the front end antenna 3, and the resonant frequency of the center of the front end antenna 3 is adjusted through the bottom end tuning inductor 4 The bandwidth, when the current antenna 3 receives the AM/FM wireless signal, the AM/FM wireless signal can be amplified and adjusted by the antenna amplifier 5, and the input and output are matched at the input end of the antenna amplifier 5 to improve the front antenna. The bandwidth of 3 helps to adjust the impedance matching between the antenna amplifier 5 and the front antenna 3, and the antenna amplifier 5 can be connected to the radio through the connector 61 of the signal transmission feeder 6, so that the antenna amplifier 5 The output end is matched with the radio impedance, and then the signal is transmitted to the radio through the signal transmission feeder 6 for receiving and receiving the sound.

Please refer to the fourth, fifth and sixth figures, which are the standing wave ratio measurement map, impedance measurement map and return loss measurement map of the creation. It can be clearly seen from the figure that this creation is utilized. The back end inductor 2 filters out the noise surge of the power supply portion, and reduces the influence of the length of the rear power supply line 1 on the front end antenna 3, and the resonant frequency of the front end antenna 3 can be adjusted through the bottom tuning inductor 4, and the antenna amplifier 5 The input end uses the bottom loading method to improve the front end antenna 3 bandwidth and assist in adjusting the impedance matching.

Before the creation of the antenna 3 at the 88MHz frequency, the measured standing wave ratio (VSWR) is 4.1698, the impedance (R+jX) is 13.031-j18.325Ω, and the return loss (RL) is -4.396dB; the front end antenna 3 At 98MHz, the standing wave ratio is 1.2857, the impedance is 41.193-j7.4839Ω, and the return loss is -18.003dB. The front-end antenna 3 has a standing wave ratio of 2.9920 and an impedance of 42.758-j51.797Ω at 108MHz. The return loss is -6.1452dB; while the front-end antenna 3 has a frequency range of 85.54~116.66MHz with a minimum required return loss of less than -3dB, and its bandwidth is above 30MHz, which is much larger than the general FM band of 87.5~108MHz. The 20MHz bandwidth, and the lowest return loss of the front-end antenna 3, that is, the resonant frequency of the antenna is 99MHz, its return loss reaches -19.5dB, far exceeding the industry standard antenna return loss is less than -10dB standard Therefore, the AM/FM power line antenna of the present invention can obtain a larger bandwidth and a better impedance matching value, thereby improving the reception effect of the AM/FM wireless signal.

However, the above description is only a preferred embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. The present invention is mainly directed to the connector 11 of the rear end power cord 1 having a connection to the vehicle power supply, and The front end antenna 3 extends from the rear end power line 1 and the front end antenna 3 extends from the front end antenna 3, and the front end antenna 3 is provided with a bottom end tuning inductance 4 at the other end of the rear end inductor 2, and the bottom end tuning inductor 4 is opposite to the front end antenna 3. The antenna amplifier 5 is disposed at the other end, and the connector 61 extending from the signal transmission feeder 6 at the antenna amplifier 5 is connected to the input port of the radio, so that the power supply part of the noise surge can be filtered by the back end inductor 2, and The back end power line 1 is isolated from the front end antenna 3 to reduce the influence of the rear end power line 1 on the front end antenna 3, and the resonant frequency of the antenna can be adjusted by adjusting the length of the front end antenna 3 and the inductance of the bottom end tuning inductor 4. And the bandwidth, assisting in adjusting the impedance matching, and then transmitting the AM/FM wireless signal received by the front end antenna 3 to the radio through the signal transmission feeder 6, and obtaining a larger bandwidth and a better impedance matching value, thereby enhancing the The signal receiving effect of the body, so the form that can achieve the above effects should be covered by this creation. Such simple modification and its equivalent structural changes should be included in the scope of the patent of this creation, and be combined with Chen Ming. .

In summary, the above-mentioned AM/FM power line antenna can achieve its efficacy and purpose. Therefore, this creation is a practical and excellent creation, which is in line with the application requirements of the new patent, and is submitted in accordance with the law. The trial committee will grant this case as soon as possible to protect the hard work of the new creators. If there is any doubt in the bureau, please do not hesitate to give instructions. The new creators will try their best to cooperate with them.

1‧‧‧Back power cord

11‧‧‧Connector

12‧‧‧ wire

2‧‧‧Back end inductance

21‧‧‧Bolt magnet

22‧‧‧ coil

23‧‧‧Heat shrink sleeve

3‧‧‧ front antenna

31‧‧‧ wire

4‧‧‧Bottom tuning inductor

41‧‧‧Bolt magnet

42‧‧‧ coil

43‧‧‧Heat shrink sleeve

5‧‧‧Antenna Amplifier

50‧‧‧shell

501‧‧‧ fixed board

51‧‧‧ boards

6‧‧‧Signal transmission feeder

61‧‧‧Connectors

Claims (8)

An AM/FM power line antenna includes a back end power line, a back end inductor, a front end antenna, a bottom end tuning inductor, an antenna amplifier, and a signal transmission feed line, wherein one end of the back end power line has a connection to a preset vehicle power source The connector has a back-end inductor at the other end of the back-end power line, and the back-end inductor extends out of the front-end antenna, and the front-end antenna has a bottom-end tuning inductance at the other end of the back-end inductor, and the bottom The end tuning inductor is provided with an antenna amplifier at the other end of the front end antenna, and the signal transmission feed line with the connector is extended from the antenna amplifier, and the connector is an input port connected to the preset radio. The AM/FM power line antenna according to claim 1, wherein the connector of the rear power line is extended with a wire, and the rear end inductor has a magnetizer, and a rear end is wound around the magnetizer. A coil formed by a predetermined number of turns of the power cord, and the outside of the coil is covered with a heat shrinkable sleeve. The AM/FM power line antenna according to claim 1, wherein the front end antenna has a wire, and the bottom end tuning inductor has a magnet and a predetermined number of turns of the front end antenna are arranged on the magnetizer. The coil is formed, and the outside of the coil is covered with a heat shrinkable sleeve. The AM/FM power line antenna of claim 1, wherein the antenna amplifier comprises a circuit board and a circuit board positioned in the housing, and is disposed on the housing and coupled to the interior of the preset vehicle body. Fixed plate. The AM/FM power line antenna according to claim 1, wherein the antenna amplifier has a circuit board, and the circuit board is provided with an FM input filter matching circuit and an AM input filter matching circuit that can be connected in parallel with the front end antenna. And by the FM input filter matching circuit The AM input filter matching circuit is respectively connected with an FM amplifying circuit and an AM amplifying circuit, and each of the FM amplifying circuit and the AM amplifying circuit is respectively connected with an FM output filter matching circuit and an AM output filter matching circuit which can be connected with the signal transmission feeder, and then The FM output filter matching circuit and the AM output filter matching circuit are connected in parallel with a power supply filter circuit connectable to the back end power line. The AM/FM power line antenna according to claim 5, wherein the FM input filter matching circuit of the antenna amplifier and the input end of the AM input filter matching circuit are connected in parallel with an electrostatic protector, and the FM output filter matching circuit An electrostatic protector is connected in parallel with the output of the AM output filter matching circuit. The AM/FM power line antenna according to claim 5, wherein a filter isolation capacitor is connected in series between the antenna of the antenna amplifier and the FM input filter matching circuit and the AM input filter matching circuit. The AM/FM power line antenna according to claim 1, wherein the connector of the signal transmission feeder is an RF connector.