CN104079311A - Communication system and communication control method - Google Patents

Abstract

A communication system and a communication control method, the system comprising: the antenna comprises an antenna structure, a first filter, a second filter, a first radio frequency chip and a second radio frequency chip. The antenna structure has a feed point and is configured to receive or transmit a first signal in a first frequency band and a second signal in a second frequency band, wherein the first frequency band is different from the second frequency band, and the second frequency band is a frequency modulation band between about 88MHz and 108 MHz. The first filter is for passing frequencies of a first frequency band and blocking frequencies of a second frequency band. The second filter is for passing frequencies of the second frequency band and blocking frequencies of the first frequency band. The first RF chip is coupled to a feed-in point of the antenna structure via a first filter. The second RF chip is coupled to the feed-in point of the antenna structure via a second filter. The system and the method of the invention can be easily applied to various miniaturized mobile devices because no additional antenna structure and antenna design space are needed.

Description

Communication system and communication control method

technical field

The present invention relates to a communication system, and more particularly to a communication system including a shared antenna structure that can cover multiple frequency bands.

Background technique

With the development of mobile communication technology, mobile devices have become more and more common in recent years, such as laptop computers, mobile phones, multimedia players and other portable electronic devices with mixed functions. In order to meet people's needs, mobile devices generally have a wireless communication function. Some cover long-distance wireless communication ranges, for example: mobile phones use 2G, 3G, LTE (Long Term Evolution) systems and their frequency bands of 700MHz, 850MHz, 900MHz, 1800MHz, 1900MHz, 2100MHz, 2300MHz and 2500MHz for communication, while some It covers short-distance wireless communication range, for example: Wi-Fi, Bluetooth and WiMAX (Worldwide Interoperability for Microwave Access) systems use 2.4GHz, 3.5GHz, 5.2GHz and 5.8GHz frequency bands for communication.

In the known technology, if wireless communication needs to be performed in multiple frequency bands, multiple antennas must be installed in the mobile device to correspond to these frequency bands respectively. However, the internal space of the mobile device is usually very limited, so so many antennas cannot be accommodated therein.

Contents of the invention

In order to solve the problems of the prior art, the present invention provides a communication system comprising: an antenna structure having a feeding point for receiving or transmitting a first signal located in a first frequency band and a signal located in a second frequency band A second signal, wherein the first frequency band is different from the second frequency band, and the second frequency band is an FM frequency band, approximately between 88MHz to 108MHz; a first filter for making the first frequency band The frequency passes and blocks the frequency of the second frequency band; a second filter is used to pass the frequency of the second frequency band and blocks the frequency of the first frequency band; a first radio frequency chip passes through the first filter coupled to the feeding point of the antenna structure, and used for processing or generating the first signal; and a second radio frequency chip, coupled to the feeding point of the antenna structure through the second filter, and used for processing or generate the second signal.

In addition, the present invention also provides a communication control method, including the following steps: using an antenna structure, receiving or transmitting a first signal in a first frequency band and a second signal in a second frequency band, wherein the first A frequency band is different from the second frequency band, and the second frequency band is an FM frequency band, approximately between 88 MHz and 108 MHz; by means of a first filter, the frequencies of the first frequency band are passed and the second frequency band is blocked The frequency of the frequency band; by a second filter, the frequency of the second frequency band is passed, and the frequency of the first frequency band is blocked; by a first radio frequency chip, the first signal is processed or generated, wherein the first The radio frequency chip is coupled to a feeding point of the antenna structure through the first filter; and the second signal is processed or generated by a second radio frequency chip, wherein the second radio frequency chip is coupled through the second filter to the feed point of the antenna structure.

In the communication system and method provided by the present invention, a shared antenna structure is included to support wireless communication of multiple frequency bands. Since no additional antenna structure and antenna design space is required, the present invention can be easily applied to various miniaturized mobile devices, making it more capable of operating in at least one FM frequency band.

Description of drawings

FIG. 1 is a schematic diagram showing a communication system according to an embodiment of the present invention;

Fig. 2 is a schematic diagram showing a communication system according to an embodiment of the present invention;

Fig. 3 is a schematic diagram showing a communication system according to an embodiment of the present invention;

Fig. 4 is a schematic diagram showing a communication system according to an embodiment of the present invention;

Fig. 5 is a schematic diagram showing a communication system according to an embodiment of the present invention;

Fig. 6 is a schematic diagram showing a communication system according to an embodiment of the present invention;

7 is a schematic diagram showing a communication system according to an embodiment of the present invention; and

FIG. 8 is a flowchart showing a communication control method according to an embodiment of the present invention.

[Description of reference signs of main components]

100, 200, 300, 400, 500, 600, 700～communication system;

110, 120, 130, 140, 150 ~ filter;

112, 122, 132～radio frequency chip;

114, 124, 134, 144, 154 ~ matching circuit;

116, 126, 136 ~ low noise amplifier;

180, 580～antenna structure;

182, 582～the feeding point of the antenna structure;

583～Short circuit point of antenna structure;

587～The first part of the antenna structure;

588～The second part of the antenna structure;

589～gap;

710～Parasite Department;

713～Short circuit point of parasitic part;

GND～ground potential;

G1～coupling gap;

S1～the first signal;

S2 ~ the second signal;

S3 ~ the third signal.

Detailed ways

In order to make the purpose, features and advantages of the present invention more comprehensible, specific embodiments of the present invention are listed below, together with the accompanying drawings, for detailed description as follows.

FIG. 1 is a schematic diagram showing a communication system 100 according to an embodiment of the invention. In some embodiments, the communication system 100 can be a part of a transceiver (Transceiver) of a mobile device, and the mobile device can be a smart phone (Smart Phone), a tablet computer (Tablet Computer), a notebook computer (Notebook Computer), or other electronic devices with wireless communication functions. As shown in FIG. 1 , the communication system 100 includes at least: an antenna structure 180, two filters 110, 120, and two radio frequency chips (RF Chip, Radio Frequency Chip) 112, 122. The antenna structure 180 can be made of metal, such as copper, silver, or aluminum. The antenna structure 180 has a feed point 182 and is used for receiving and/or transmitting a first signal S1 in a first frequency band and a second signal S2 in a second frequency band, wherein the first frequency band is different from the second frequency band. In a preferred embodiment, the second frequency band is a frequency modulation (Frequency Modulation, FM) frequency band, which is approximately between 88MHz and 108MHz. The first frequency band can be selected according to different needs, please refer to the subsequent embodiments for details. The type of the antenna structure 180 is not limited in the present invention. For example, the antenna structure 180 can be a monopole antenna (Monopole Antenna), a loop antenna (Loop Antenna), a dipole antenna (Dipole Antenna), a planar inverted F-shaped antenna (Planar Inverted F Antenna, PIFA), a complement Nail antenna (Patch Antenna), or a chip antenna (Chip Antenna). The filter 110 is used to pass the frequencies of the first frequency band and block the frequencies of the second frequency band. The filter 120 is used to pass the frequencies of the second frequency band and block the frequencies of the first frequency band. In other words, both filters 110 and 120 have partial functions of band pass filter (Band Pass Filter, BPF) and band rejection filter (Band Rejection Filter, BRF), but they can pass frequency band (Pass Band) and stop frequency band (Stop Band) is different. In some embodiments, filters 110, 120 each include one or more capacitors and inductors. The radio frequency chip 112 is coupled to the feeding point 182 of the antenna structure 180 via the filter 110 and used for processing or (and) generating the first signal S1. The radio frequency chip 122 is coupled to the feeding point 182 of the antenna structure 180 via the filter 120, and is used for processing or (and) generating the second signal S2. Because of the filters 110, 120, the radio frequency chips 112, 122 will not be interfered by irrelevant frequencies, and good processing performance can still be maintained under the shared antenna structure. The radio frequency chips 112, 122 can be implemented by integrated circuits (Integrated Circuits, ICs). In a preferred embodiment, the radio frequency chip 122 is a FM processing chip, and the filter 120 can pass the FM frequency band.

In some embodiments, the first frequency band is a Bluetooth or (and) a Wi-Fi frequency band, which is approximately between 2400MHz and 2500MHz. In some embodiments, the first frequency band is a Global Positioning System (GPS) frequency band, which is approximately between 1565MHz and 1585MHz. In some embodiments, the first frequency band is an analog television (ATV) frequency band, which is approximately between 470 MHz and 862 MHz. In some embodiments, the first frequency band is a near field communication (Near Field Communication, NFC) frequency band, which is located at about 13.56 MHz. In some embodiments, the first frequency band is a wireless charging (Wireless Charging) frequency band, which is located at approximately 13.56 MHz. It should be noted that the present invention is not limited thereto. In other embodiments, the first frequency band may also cover other frequency ranges not mentioned above.

In the preferred embodiment of the present invention, the antenna structure 180, the filter 110, and the RF chip 112 form a primary communication path, while on the other hand, the antenna structure 180, the filter 120, and the RF chip 122 form a secondary communication path. The first frequency band of the primary communication path can be selected as various frequency bands, for example: a Bluetooth/Wi-Fi frequency band, or a GPS frequency band, etc., and the second frequency band of the secondary communication path is all selected is an FM band. Since the filters 110, 120 can provide different resonant lengths (for example: the filter 120 can include at least one inductor to increase the resonant length), the primary communication path and the secondary communication path can share the antenna structure 180 to transmit and receive at different The first signal S1 and the second signal S2 of the frequency band. In other words, the filter 110 and the antenna structure 180 can be regarded as a first antenna, and the filter 120 and the antenna structure 180 can be regarded as a second antenna, wherein the first antenna can cover the first frequency band, and the second antenna The second frequency band may be covered. Under this design, the communication system of the present invention only needs a single antenna structure to operate in multiple frequency bands, which has the advantages of reducing cost and saving internal space of the mobile device. For example, the present invention can increase the function of listening to FM radio in general smart phones by sharing their main antenna (for example: a Bluetooth/Wi-Fi antenna, or a near field communication antenna, etc.).

FIG. 2 is a schematic diagram showing a communication system 200 according to an embodiment of the invention. Figure 2 is similar to Figure 1. In the embodiment of FIG. 2 , the communication system 200 further includes two matching circuits (Matching Circuit) 114, 124 and two low noise amplifiers (Low Noise Amplifier, LNA) 116, 126. The matching circuits 114 and 124 are respectively used to adjust the impedance matching of the primary communication path and the secondary communication path. Matching circuits 114, 124 may each include one or more inductors and capacitors. In some embodiments, the radio frequency chip 112 is coupled to the feeding point 182 of the antenna structure 180 via the matching circuit 114 and the filter 110, and the radio frequency chip 122 is coupled to the feeding point 182 of the antenna structure 180 via the matching circuit 124 and the filter 120. Point 182. The LNA 116 is used to amplify the received first signal S1, and the LNA 126 is used to amplify the received second signal S2. In some embodiments, the radio frequency chip 112 is coupled to the feed point 182 of the antenna structure 180 via the low noise amplifier 116 and the filter 110, and the radio frequency chip 122 is coupled to the feed point 182 of the antenna structure 180 via the low noise amplifier 126 and the filter 120. Feed point 182 . If a matching circuit and a low noise amplifier are arranged in a communication path at the same time, there is no restriction on the connection sequence therebetween. For example, matching circuit 114 may be swapped with LNA 116 in the primary communication path. It should be noted that the matching circuits 114, 124 and the low noise amplifiers 116, 126 are used to improve the performance of the communication system 200, but they are not essential components of the present invention. In other embodiments, they may also be removable from the communication system 200 . The remaining features of the communication system 200 in FIG. 2 are similar to the communication system 100 in FIG. 1 , so both embodiments can achieve similar operational effects.

FIG. 3 is a schematic diagram showing a communication system 300 according to an embodiment of the invention. Figure 3 is similar to Figure 1. In the embodiment of FIG. 3 , the communication system 300 further includes a filter 130 and a radio frequency chip 132 . In addition to the first signal S1 and the second signal S2, the antenna structure 180 is also used to receive or (and) transmit a third signal S3 in a third frequency band, wherein the third frequency band is different from the second frequency band or (and ) is different from the first frequency band. The filter 130 is used to pass the frequencies of the third frequency band and block the frequencies of the first frequency band and the second frequency band. The radio frequency chip 132 is coupled to the feeding point 182 of the antenna structure 180 via the filter 130, and is used for processing or (and) generating the third signal S3. In addition, the filter 110 of the primary communication path and the filter 120 of the secondary communication path can also be used to block frequencies of the third frequency band. In this embodiment, the antenna structure 180, the filter 130, and the radio frequency chip 132 form another secondary communication path, so that the communication system 300 can share the antenna structure 180 to receive and transmit the first signal S1 and the second signal located in at least three frequency bands. signal S2, and a third signal S3. In other embodiments, the communication system 300 may include more secondary communication paths, for example, four or five. Similarly, the second frequency band is still selected as an FM frequency band, which is approximately between 88 MHz and 108 MHz. In some embodiments, the first frequency band is a Bluetooth or/and a Wi-Fi frequency band, which is approximately between 2400MHz and 2500MHz, and the third frequency band is a GPS frequency band, which is approximately between Between 1565MHz and 1585MHz. In some embodiments, the first frequency band is a near field communication frequency band located at approximately 13.56 MHz, and the third frequency band is a wireless charging frequency band approximately located at 13.56 MHz. The remaining features of the communication system 300 in FIG. 3 are similar to the communication system 100 in FIG. 1 , so both embodiments can achieve similar operational effects.

FIG. 4 is a schematic diagram showing a communication system 400 according to an embodiment of the invention. Figure 4 is similar to Figures 2 and 3. In the embodiment of FIG. 4 , the communication system 400 further includes a matching circuit 134 and a low noise amplifier 136 . Matching circuit 134 may include one or more inductors and capacitors and is used to adjust the impedance matching of its communication path. In some embodiments, the radio frequency chip 132 is coupled to the feeding point 182 of the antenna structure 180 via the matching circuit 134 and the filter 130 . The low noise amplifier 136 is used to amplify the received third signal S3. In some embodiments, the radio frequency chip 132 is coupled to the feeding point 182 of the antenna structure 180 via the low noise amplifier 136 and the filter 130 . Similarly, the matching circuit 134 and the low noise amplifier 136 are used to improve the performance of the communication system 400, but neither is a necessary component of the present invention. In other embodiments, they may also be removable from the communication system 400 . The remaining features of the communication system 400 in FIG. 4 are similar to the communication systems 200 and 300 in FIGS. 2 and 3 , so these three embodiments can achieve similar operational effects.

FIG. 5 is a schematic diagram showing a communication system 500 according to an embodiment of the invention. Figure 5 is similar to Figure 1. In the embodiment of FIG. 5 , the communication system 500 includes an antenna structure 580 having a specific shape. The antenna structure 580 can be a planar structure made of metal, such as copper, silver, or aluminum. In some embodiments, the antenna structure 580 can be printed on a dielectric substrate, such as an FR4 substrate. In more detail, the antenna structure 580 includes a first part 587 and a second part 588, wherein the first part 587 is roughly a rectangle, the second part 588 is roughly a J shape, and a feeding point 582 of the antenna structure 580 is Approximately at a corner of the first section 587 . Feed point 582 is coupled to filter 110 of the primary communication path and filter 120 of the secondary communication path. The first portion 587 and the second portion 588 of the antenna structure 580 can define a notch 589 , and the notch 589 is roughly L-shaped. The above-mentioned shape of the antenna structure 580 is only an example, and is not a limitation of the present invention. In some embodiments, the communication system 500 may further include another secondary communication path for receiving and transmitting a third signal S3, as shown in FIG. 3 . In some embodiments, the communication system 500 may further include one or more matching circuits and low noise amplifiers, as shown in FIG. 2 and FIG. 4 . The remaining features of the communication system 500 in FIG. 5 are similar to the communication system 100 in FIG. 1 , so the two embodiments can achieve similar operational effects.

FIG. 6 is a schematic diagram showing a communication system 600 according to an embodiment of the invention. Figure 6 is similar to Figure 5. In the embodiment of FIG. 6 , the antenna structure 580 of the communication system 600 also has a short-circuit point 583 coupled to a ground potential GND. In some embodiments, the short-circuit point 583 of the antenna structure 580 is located substantially at another corner of the first portion 587 thereof. For example, the feed-in point 582 and the short-circuit point 583 may be respectively located at two opposite corners of the first part 587 of the rectangle, but not limited thereto. In addition, the communication system 600 further includes a filter 140 and a matching circuit 144 . The filter 140 is coupled between the short-circuit point 583 of the antenna structure 580 and the ground potential GND, and is used to block frequencies of the second frequency band (ie, an FM band, which is approximately between 88 MHz and 108 MHz). Since the second frequency band of the secondary communication path is corresponding to a longer wavelength, adding a filter 140 for blocking the second frequency band in a ground path of the antenna structure 580 can make the ground path for the second frequency band The signal is an open circuit (Open Circuit), so as to maintain the effective resonance length of the antenna structure 580 in the second frequency band. In some embodiments, the short-circuit point 583 can also be coupled to the ground potential GND via the filter 140 and the matching circuit 144 . Matching circuit 144 may include one or more inductors and capacitors. The matching circuit 144 is used to adjust the impedance matching of the ground path of the antenna structure 580 , but is not a necessary component of the present invention. The remaining features of the communication system 600 in FIG. 6 are similar to the communication system 500 in FIG. 5 , so both embodiments can achieve similar operational effects.

FIG. 7 is a schematic diagram showing a communication system 700 according to an embodiment of the invention. Figure 7 is similar to Figure 6. In the embodiment of FIG. 7 , the communication system 700 further includes a parasitic unit 710 . The parasitic portion 710 can be a planar structure made of metal, such as copper, silver, or aluminum. In some embodiments, the parasitic portion 710 can be printed on a dielectric substrate, such as an FR4 substrate. As shown in FIG. 7 , the parasitic part 710 is separated from the antenna structure 580 and has a short-circuit point 713 . The parasitic part 710 is close to the antenna structure 580 , and there is a narrow coupling gap G1 between the parasitic part 710 and the antenna structure 580 . In some embodiments, the parasitic portion 710 is roughly I-shaped, and the short-circuit point 713 is roughly located at one end of the parasitic portion 710 . In other embodiments, the parasitic portion 710 can also be in other shapes, for example, roughly an L-shape, an S-shape, or a U-shape, and the short-circuit point 713 is still roughly located at one end of the parasitic portion 710 . In some embodiments, the short-circuit point 713 of the parasitic portion 710 is close to the short-circuit point 583 of the antenna structure 580 . In addition, the communication system 700 also includes a filter 150 and a matching circuit 154 . The filter 150 is coupled between the short-circuit point 713 of the parasitic part 710 and the ground potential GND, and is used to block frequencies of the second frequency band (ie, a FM band, which is approximately between 88 MHz and 108 MHz). Similarly, the filter 150 can make a ground path of the parasitic part 710 an open circuit for the signal of the second frequency band. In some embodiments, the short-circuit point 713 can also be coupled to the ground potential GND via the filter 150 and the matching circuit 154 . Matching circuit 154 may include one or more inductors and capacitors. The matching circuit 154 is used to adjust the impedance matching of the ground path of the parasitic part 710 , but it is not a necessary component of the present invention. The remaining features of the communication system 700 in FIG. 7 are similar to those of the communication system 600 in FIG. 6 , so both embodiments can achieve similar operational effects.

FIG. 8 is a flowchart showing a communication control method according to an embodiment of the present invention. First, in step S810, a first signal in a first frequency band and a second signal in a second frequency band are received or (and) transmitted by an antenna structure, wherein the first frequency band is different from the second frequency band, and the second frequency band is an FM frequency band approximately between 88 MHz and 108 MHz. In step S820, a first filter is used to pass the frequencies of the first frequency band and block the frequencies of the second frequency band. In step S830, a second filter is used to pass the frequencies of the second frequency band and block the frequencies of the first frequency band. In step S840, the first signal is processed or (and) generated by a first radio frequency chip, wherein the first radio frequency chip is coupled to a feeding point of the antenna structure through the first filter. Finally, in step S850, the second signal is processed or (and) generated by a second radio frequency chip, wherein the second radio frequency chip is coupled to the feeding point of the antenna structure through the second filter. It is worth noting that the above steps do not have to be performed in order. In addition, every detailed feature of the embodiments shown in FIGS. 1-7 can be applied to the present communication control method.

The above-mentioned device shapes, device parameters, and frequency ranges are not limitations of the present invention. Designers can adjust these settings according to different needs.

The present invention provides a novel communication system, which includes a common antenna structure to support wireless communication of multiple frequency bands. Since no additional antenna structure and antenna design space is required, the present invention can be easily applied to various miniaturized mobile devices, making it more capable of operating in at least one FM frequency band.

The ordinal numbers in this description and the scope of the patent application, such as "first", "second", "third" and so on, have no sequential relationship with each other, and are only used to mark and distinguish between two different elements of the name.

Although the present invention is disclosed as above with preferred embodiments, it is not intended to limit the scope of the present invention. Any skilled person familiar with the common knowledge in the art may make some changes without departing from the spirit and scope of the present invention. and modification, so the scope of protection of the present invention should be determined by the scope defined by the appended claims.

Claims (21)

1. a communication system, comprising:

One antenna structure, there is a load point, and for receiving or transmit a secondary signal that is positioned at a first signal of one first frequency band and is positioned at one second frequency band, wherein this first frequency band is different from this second frequency band, and this second frequency band is a frequency modulation frequency band, approximately between between 88MHz to 108MHz;

One first filter, for the frequency of this first frequency band is passed through, and stops the frequency of this second frequency band;

One second filter, for the frequency of this second frequency band is passed through, and stops the frequency of this first frequency band;

One first radio frequency chip, is coupled to this load point of this antenna structure via this first filter, and for the treatment of or produce this first signal; And

One second radio frequency chip, is coupled to this load point of this antenna structure via this second filter, and for the treatment of or produce this secondary signal.

2. communication system as claimed in claim 1, wherein this first frequency band is a bluetooth or a Wi-Fi frequency band, approximately between between 2400MHz to 2500MHz.

3. communication system as claimed in claim 1, wherein this first frequency band is a GPS (Global Position System) frequency band, approximately between between 1565MHz to 1585MHz.

4. communication system as claimed in claim 1, wherein this first frequency band is a simulated television frequency band, approximately between between 470MHz to 862MHz.

5. communication system as claimed in claim 1, wherein this first frequency band is a near-field communication frequency band, is approximately positioned at 13.56MHz.

6. communication system as claimed in claim 1, wherein this first frequency band is a wireless charging frequency band, is approximately positioned at 13.56MHz.

7. communication system as claimed in claim 1, also comprises:

One first low noise amplifier, for amplifying this first signal of reception, wherein this first radio frequency chip is coupled to this load point of this antenna structure via this first low noise amplifier and this first filter; And

One second low noise amplifier, for amplifying this secondary signal of reception, wherein this second radio frequency chip is coupled to this load point of this antenna structure via this second low noise amplifier and this second filter.

8. communication system as claimed in claim 1, also comprises:

One first match circuit, wherein this first radio frequency chip is coupled to this load point of this antenna structure via this first match circuit and this first filter; And

One second match circuit, wherein this second radio frequency chip is coupled to this load point of this antenna structure via this second match circuit and this second filter.

9. communication system as claimed in claim 1, wherein this antenna structure is also for receiving or transmit one the 3rd signal that is positioned at one the 3rd frequency band, and the 3rd frequency band is different from this second frequency band, and this communication system also comprises:

One the 3rd filter, for the frequency of the 3rd frequency band is passed through, and stops the frequency of this first frequency band and this second frequency band; And

One the 3rd radio frequency chip, is coupled to this load point of this antenna structure via the 3rd filter, and for the treatment of or produce the 3rd signal;

Wherein, this first filter and this second filter are also for stopping the frequency of the 3rd frequency band.

10. communication system as claimed in claim 9, wherein this first frequency band is a bluetooth or a Wi-Fi frequency band, approximately between between 2400MHz to 2500MHz, and the 3rd frequency band is a GPS (Global Position System) frequency band, approximately between between 1565MHz to 1585MHz.

11. communication systems as claimed in claim 9, wherein this first frequency band is a near-field communication frequency band, be approximately positioned at 13.56MHz, and the 3rd frequency band is a wireless charging frequency band, is approximately positioned at 13.56MHz.

12. communication systems as claimed in claim 9, also comprise:

One the 3rd low noise amplifier, for amplifying the 3rd signal of reception, wherein the 3rd radio frequency chip is coupled to this load point of this antenna structure via the 3rd low noise amplifier and the 3rd filter.

13. communication systems as claimed in claim 9, also comprise:

One the 3rd match circuit, wherein the 3rd radio frequency chip is coupled to this load point of this antenna structure via the 3rd match circuit and the 3rd filter.

14. communication systems as claimed in claim 1, wherein this antenna structure comprises a first and a second portion, and this first is roughly a rectangle, and it is one J-shaped that this second portion is roughly, and this load point is roughly positioned at a corner of this first.

15. communication systems as claimed in claim 14, wherein this first of this antenna structure and this second portion define a breach, and this breach is roughly a L font.

16. communication systems as claimed in claim 1, wherein this antenna structure also has one first short dot, and this communication system also comprises:

One the 4th filter, is coupled between this first short dot and an earthing potential, and for stopping the frequency of this second frequency band.

17. communication systems as described in claim 16, also comprise:

One the 4th match circuit, wherein this first short dot is coupled to this earthing potential via the 4th filter and the 4th match circuit.

18. communication systems as claimed in claim 1, also comprise:

One Parasitica, separated with this antenna structure, and approach this antenna structure, wherein this Parasitica has one second short dot; And

One the 5th filter, is coupled between this second short dot and an earthing potential, and for stopping the frequency of this second frequency band.

19. communication systems as described in claim 18, also comprise:

One the 5th match circuit, wherein this second short dot is coupled to this earthing potential via the 5th filter and the 5th match circuit.

20. communication systems as claimed in claim 18, wherein this Parasitica is roughly an I font, and this second short dot is roughly positioned at one end of this Parasitica.

21. 1 kinds of communication control methods, comprise the following steps:

By an antenna structure, receive or transmit a secondary signal that is positioned at a first signal of one first frequency band and is positioned at one second frequency band, wherein this first frequency band is different from this second frequency band, and this second frequency band is a frequency modulation frequency band, approximately between between 88MHz to 108MHz;

By one first filter, the frequency of this first frequency band is passed through, and stopped the frequency of this second frequency band;

By one second filter, the frequency of this second frequency band is passed through, and stopped the frequency of this first frequency band;

By one first radio frequency chip, process or produce this first signal, wherein this first radio frequency chip is coupled to this antenna structure one load point via this first filter; And

By one second radio frequency chip, process or produce this secondary signal, wherein this second radio frequency chip is coupled to this load point of this antenna structure via this second filter.