CN102769180B - Omnidirectional antenna and electronic device - Google Patents

Abstract

The present invention provides an omnidirectional antenna, which includes: a dielectric substrate including two surfaces; a first radiation unit arranged on one surface of the dielectric substrate, including a first long arm and a first long arm spaced apart from the first long arm. A short arm; the second radiating unit includes a second long arm and a second short arm spaced apart from the second long arm, the second long arm and the second short arm are respectively opposite to the first short arm and the first long arm, A gap is formed between the first long arm and the second long arm. The omnidirectional antenna of the present invention is a dual-band broadband omnidirectional antenna, which can work in two frequency bands, and the impedance can be adjusted, and the center frequency point can also be adjusted according to needs. The electronic device using the omnidirectional antenna can be based on IEEE 802.11 Wireless signal transmission can meet the requirements of wireless signal coverage in a certain area.

Description

An omnidirectional antenna and electronic device

technical field

The invention relates to the field of wireless communication equipment, more specifically, to an omnidirectional antenna and an electronic device using the omnidirectional antenna.

Background technique

In the wireless communication system, users have requirements for continuous improvement of data throughput, high QoS service quality and strong anti-interference ability of the wireless communication system. For example, in communication systems such as IEEE802.11a/g/h, a wireless access point (AP) transmits data with one or more wireless user equipment through a wireless link. The wireless UE may be susceptible to other access points, other wireless communication devices, changes or interference in the wireless link environment between the access point and the remote receiving point, and the like. The interference may greatly reduce the data transmission capability of the wireless link, or greatly increase the bit error rate and poor QoS service quality, which may be unbearable for users.

Wireless electronic devices such as portable computers and handheld electronic devices are becoming more and more popular. Devices such as these often have wireless communication capabilities. For example, some electronic devices may use long-range wireless communication circuitry, such as cellular telephone circuitry, to communicate using the 850MHz, 900MHz, 1800MHz, and 1900MHz cellular telephone frequency bands (e.g., the primary Global System for Mobile Communications or GSM cellular telephone frequency bands). It is also possible to use the long distance wireless communication circuit to handle the 2100MHZ frequency band and other frequency bands. Electronic devices may use short-range wireless communication links to handle communications with nearby devices. For example, wireless communication electronic devices may communicate using the 2.4GHz and 5GHz Wi-Fi (IEEE 802.11) frequency bands (sometimes called the Wireless LAN frequency band) and the 2.4GHz Bluetooth (Bluetooth) frequency band.

Especially now that the wireless mobile Internet based on the IEEE 802.11 protocol is developing rapidly, wireless mobile Internet devices, systems and subsystems put forward higher technical parameters (gain value, standing wave and multi-antenna isolation and other parameters) requirements for antenna components, and antennas have also become constraints. An important technical bottleneck of wireless mobile Internet equipment, systems and subsystems. Some places that require comprehensive wireless network coverage not only require the antenna to have good technical parameters, but also put forward requirements on the directivity of the antenna. Therefore, there is a need to provide an improved antenna for wireless electronic devices, for example, its applications include wireless access equipment and wireless routing equipment.

Contents of the invention

In order to solve the above problems, the present invention provides an omnidirectional antenna, which has good omnidirectionality, meets the requirements of wireless signal coverage of electronic devices using the omnidirectional antenna, and can provide network users in a certain area with good , stable wireless signal, in order to achieve the above object, the present invention adopts the following technical solutions.

An omnidirectional antenna, characterized in that it includes: a dielectric substrate, including two surfaces; a first radiation unit, arranged on one surface of the dielectric substrate, including a first long arm and a long arm spaced apart from the first long arm The first short arm; the second radiation unit, comprising a second long arm and a second short arm spaced apart from the second long arm, the second long arm and the second short arm are respectively connected to the first The short arm is opposite to the first long arm, and a gap is formed between the first long arm and the second long arm.

Further, the first radiating unit is symmetrical to the second radiating unit.

Further, the dielectric substrate is rectangular and has a longitudinal centerline, the inner sides of the first long arm and the second long arm coincide with the centerline respectively, and the first long arm and the second long arm The ends of the long arms form the slit.

Further, the first radiating unit and the second radiating unit are rectangular, and the first long arm, the first short arm, the second long arm, and the second short arm are separated from the One side of the first radiating unit and the second radiating unit is extended.

Further, the first long arm, the first short arm, the second long arm, and the second short arm are rectangular.

Further, the slit is rectangular.

Further, the lateral lengths of the first long arm and the second long arm are equal to half of the lateral length of the dielectric substrate.

Further, the positions where the first long arm and the second long arm are separated from each other by the gap form a feeding point and a grounding point.

Further, a signal transmission line is also included, and the signal transmission line is electrically connected to the feeding point.

The present invention also provides an electronic device capable of transmitting and receiving wireless signals, including the omnidirectional antenna mentioned in the claims.

Further, the electronic device includes a wireless access point and a router.

The omnidirectional antenna of the present invention is a dual-band broadband omnidirectional antenna, which can work in two frequency bands, and the impedance can be adjusted, and the center frequency point can also be adjusted according to needs. The electronic device using the omnidirectional antenna can be based on IEEE 802.11 Wireless signal transmission can meet the requirements of wireless signal coverage in a certain area.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment:

Fig. 1 is the structural representation of omnidirectional antenna of the present invention;

FIG. 2 is a simulated S-parameter curve diagram of the omnidirectional antenna in FIG. 1 .

Detailed ways

Reference will now be made in detail to the embodiments depicted in the accompanying drawings. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other embodiments, well-known methods, procedures, components and circuits have not been described in detail so as not to unnecessarily obscure the embodiments.

1 shows an embodiment of the omnidirectional antenna of the present invention, the omnidirectional antenna includes a dielectric substrate 1, a first radiation unit 2, a second radiation unit 3 and a slot 4, the dielectric substrate 1 has two surfaces, the second The first radiation unit 2 , the second radiation unit 3 and the slot 4 are all arranged on the same surface of the dielectric substrate 1 . The first radiating unit 2 and the second radiating unit 3 are center-symmetrically distributed on the dielectric substrate 1, and the center of symmetry is the intersection point of the longitudinal centerline and the transverse centerline of the dielectric substrate. The first radiating unit 2 and the second radiating unit 3 are both Rectangles whose respective inner sides coincide with the longitudinal centerline respectively. The first radiating unit 2 and the second radiating unit 3 are separately provided with a first long arm 21, a first short arm 22, a second long arm 31, and a second short arm 32, respectively from the first radiating unit 2 and the second Extending from opposite sides of the radiation unit 3 , the first long arm 21 and the first short arm 22 are opposite to the second short arm 32 and the second long arm 31 respectively. The slit 4 is arranged between the first long arm 21 and the second long arm 31, and is formed at the ends of the two. The slit 4 is rectangular, and the first long arm 21 and the second long arm 31 are formed at opposite positions of the slit 4. The feeding point 211 and the grounding point 311 , the feeding point can also be set on the second long arm 31 , and the corresponding grounding point is set on the first long arm 31 .

The dielectric substrate 1 can be made of FR4, and the first radiating unit 2 and the second radiating unit 3 can be directly processed from metal sheets, and then attached to the surface of the dielectric substrate 1, or can be etched after covering the surface of the dielectric substrate 1 with a metal layer The shapes of the first radiating unit 2 and the second radiating unit 3 are shown.

In this embodiment, the first radiating unit 2 and the second radiating unit 3 are arranged on the same surface of the dielectric substrate 1. In other embodiments, the first radiating unit 2 and the second radiating unit 3 can be arranged on On different surfaces of the dielectric substrate 1, for example, the first radiating unit 2 is arranged on one surface of the dielectric substrate 1, and the second radiating unit 3 is arranged on the other surface of the dielectric substrate 1, and then through the metallization through the dielectric substrate 1 The holes make the feeding point and the grounding point on the same surface of the dielectric substrate 1 .

The width of the slot 4 affects the high-frequency and low-frequency operating frequency bands of the antenna, and the increase in the width of the slot 4 will move the operating frequency band of the antenna forward; the distance between the first long arm 21 and the first short arm 22, the distance between the second long arm 31 and the second The distance between the short arms 32 affects the high-frequency working frequency band and impedance, and the smaller the distance, the working frequency band moves forward; the length of the first short arm 22 and the second short arm 32 affects the low frequency and high frequency at the same time, and the longer the length, the working frequency band moves forward ; The distance between the first short arm 22 and the second long arm 31, and the distance between the first long arm 21 and the second short arm 32 also affect the working frequency band and impedance of the antenna.

The antenna also includes a signal transmission line (not shown in the figure), the signal transmission line connects the feed point 211 and the ground point 311 , and performs signal transmission between the antenna and the electronic device.

Referring again to shown in Fig. 1, this figure has shown a kind of concrete antenna, and this antenna total length is 48mm, and the width of the first radiating element 2 and the second radiating element 3 is 8mm, and the first radiating element 2 and the second radiating element 3 The length of the rectangular part and the long arm part is 25 mm, the length of the rectangular part and the short arm part of the first radiation unit 2 and the second radiation unit 3 is 22 mm, the width of the short arm is 1.6 mm, and the width of the gap 4 is 0.6 mm.

Refer to Figure 2, which shows the simulated S-parameter curve of the omnidirectional antenna in Figure 1, and select the loss at the critical position of -10dB to mark the frequency points, as shown in the following table:

Frequency/GHz Loss/dB 2.2334 -10.094 2.687 -10.003 5.0241 -10 6.0077 -10.045

As shown in the table above, the antenna has a loss below -10dB at 2.2334-2.687GHz and 5.0241-6.0077GHz, indicating that the antenna can work normally in the frequency ranges of 2.2334-2.687GHz and 5.0241-6.0077GHz.

The omnidirectional antenna of the present invention can be used in an electronic device, so that the electronic device can transmit and receive wireless signals through the omnidirectional antenna. As for the connection between the antenna and the circuit in the electronic device, it is based on an existing solution, and will not be described here.

It is worth mentioning that the electronic devices used by the antenna include but are not limited to wireless access points, routers, bluetooth modules and the like.

Embodiments of the present invention have been described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementations, and the above-mentioned specific implementations are only illustrative, rather than restrictive, and those of ordinary skill in the art will Under the enlightenment of the present invention, many forms can also be made without departing from the gist of the present invention and the protection scope of the claims, and these all belong to the protection of the present invention.

Claims (8)

1. an omnidirectional antenna, is characterized in that, comprising:

One medium substrate, comprises two surfaces;

First radiating element, be arranged at described medium substrate one surface, comprise first long-armed and with described first long-armed spaced first galianconism;

Second radiating element, comprise second long-armed and with described second long-armed spaced second galianconism, the end of described second long-armed end and described second galianconism is relative with described first long-armed end with the end of described first galianconism respectively, described first long-armed and described second long-armed between form a gap;

Wherein, described medium substrate is rectangular and have a longitudinal centre line and a cross central line, described first radiating element and described second radiating element Central Symmetry, and symmetrical centre is the intersection point of described medium substrate longitudinal centre line and cross central line, described first long-armed and described second long-armed inner side overlaps with described longitudinal centre line respectively, described first long-armed and described second long-armedly on the direction of the longitudinal centre line along described medium substrate, be provided with overlapping region, and described first inner side that is long-armed and described second long-armed end being positioned at described overlapping region forms described gap, the position that described in described first long-armed and described second long-armed interval, gap is relative forms distributing point and earth point.

2. omnidirectional antenna according to claim 1, it is characterized in that, described first radiating element and described second radiating element all rectangular, described first long-armed, described first galianconism and described second long-armed, described second galianconism extending respectively from described first radiating element and described second radiating element.

3. omnidirectional antenna according to claim 2, is characterized in that, described first long-armed, described first galianconism and described second long-armed, described second galianconism rectangular.

4. omnidirectional antenna according to claim 1, is characterized in that, described gap is rectangular.

5. the omnidirectional antenna according to Claims 2 or 3 or 4, is characterized in that, described first long-armed and described second long-armed length in the horizontal equals the half of described medium substrate lateral length.

6. omnidirectional antenna according to claim 1, is characterized in that, also comprises a signal transmssion line, and described signal transmssion line is electrically connected on described distributing point.

7. an electronic installation, can carry out the transmitting-receiving of wireless signal, it is characterized in that, comprise the omnidirectional antenna described in any one of claim 1-6.

8. electronic installation according to claim 7, is characterized in that, described electronic installation comprises WAP (wireless access point) and router.