KR100744810B1 - Ultra wide band antenna of patch type - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to antennas, and more particularly, to an ultra-wideband antenna for ultra wide band (UWB) communication and a broadband antenna for next-generation mobile communication. To this end, the present invention is a patch-type monopole antenna in which a specific radiation pattern is printed on the front and back of the dielectric, the elliptical oval monopole radiator is printed to have a constant radiation pattern on the front of the dielectric, and the ultra-wideband signal is also received by operating power An oval monopole radiator portion having a feeding portion printed thereon for transmitting and receiving; A ground portion having a streamlined radiation guide arm for grounding is formed on the back of the dielectric.

Description

ULTRA WIDE BAND ANTENNA OF PATCH TYPE

1 is an exemplary view for explaining the structure of a patch-type ultra-wideband antenna of the present invention.

FIG. 2 is an exemplary diagram for explaining a pattern of an ultra-wideband antenna in FIG. 1. FIG.

3 is a graph showing the return loss and gain characteristics of a patch-type ultra-wideband antenna according to an embodiment of the present invention.

4 is an exemplary view showing the radiation characteristics of a patch-type ultra-wideband antenna according to an embodiment of the present invention.

*** Explanation of symbols for main parts of drawing ***

10: elliptical monopole radiator section 11: monopole radiator

12: feeding part 20: grounding part

100: patch type ultra wideband antenna a: front side of dielectric

b: back of dielectric

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to antennas, and more particularly, to an ultra-wideband antenna for UWB (Ultra-Wide Band) communication and a broadband antenna for next-generation mobile communication.

In general, the UWB communication system is a technology for transmitting information using a narrow pulse of less than 1nsec instead of the RF carrier. Due to the nature of the pulse, low power spectrum, such as baseband noise, exists over a wide band, allowing communication without interfering with other wireless communication systems currently in use.

Bandwidth can also be taken over broadband, which is advantageous over conventional systems in terms of transmission speed. In addition, unlike the narrowband communication method, a carrier free circuit configuration method eliminates the need for an intermediate frequency (IF) stage.

This greatly simplifies the RF-related circuitry, enabling a low cost communication system. These advantages have various advantages, such as being the optimal solution for short-range wireless network configuration, so that many domestic and foreign related institutions have considerable interest in UWB technology development.

In particular, one of the important parts of the UWB system configuration is the antenna characteristics. UWB antennas should basically have broadband characteristics (25%, 1.5GHz occupied bandwidth) and maintain a constant pattern regardless of frequency. In addition, the size must be small to meet the various applications and miniaturization trend of wireless network configuration. In addition, there is a need for a new antenna that must have an omnidirectional radiation pattern for mobility. Here, the frequency bandwidth required by the UWB communication system is 3.1 ~ 10.6GHz.

However, the conventional antenna has a disadvantage in that the antenna frequency bandwidth is narrow in a form of resonating at a specific frequency. Recently, there are antennas with broadband characteristics due to various broadband techniques such as research using U-lot and specific types of slots in antenna radiator, but they are also only 5% ~ 10% and the size is not suitable for mobile communication. In addition, there are traveling wave antennas and log periodic antennas, but the radiated form of the antennas exhibits characteristics of directional antennas not suitable for mobile communication, and due to signal dispersion It is not suitable as an antenna for UWB.

 In addition, recently announced ultra-small UWB antennas should have the same omnidirectional pattern in broadband, but the characteristics of the UWB antennas are not suitable for wireless mobile communication as they are not omnidirectional at higher frequencies. have.

Therefore, the present invention was created to solve the above problems, the size of the antenna is small, has a non-directional pattern irrespective of the frequency, it is manufactured in a microminiature and simple structure and easy to manufacture patch type ultra The purpose is to provide a broadband antenna.

The present invention for achieving the above object, in the patch-type monopole antenna is printed a specific radiation pattern on the front and back of the dielectric,

An elliptical monopole radiator having an elliptical monopole radiator having a predetermined radiation pattern on the front surface of the dielectric, and a feeding unit for receiving and receiving an operating power supply and transmitting and receiving an ultra-wideband signal;

A grounding portion having a streamlined radiation guide arm for grounding is formed on the back surface of the dielectric.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that in the following description, only parts necessary for understanding the operation and operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

In the following description specific details of the patched ultra-wideband antenna are shown to provide a more general understanding of the invention. It will be apparent to one of ordinary skill in the art that the present invention may be readily practiced without these specific details and also by their modifications.

In the following description, the overall size of the antenna is 30 × 27 mm, the dielectric height is 0.8 mm, and the dielectric constant is assumed to be 4.7.

1 is an exemplary view for explaining the structure of a patch-type ultra-wideband antenna of the present invention.

Referring to FIG. 1, first, the patch type ultra-wideband antenna 100 has a microstrip feeding type and is provided on the front surface (a) and the rear surface (b) of the dielectric (for example, RF-4 substrate) (a, b). The conductor pattern is printed. An oval monopole radiator 10 is printed on the front surface a to contribute to a wide band characteristic and a constant radiation pattern. Here, the monopole radiator 10 is provided with an elliptical elliptical monopole radiator 11 having a predetermined radiation pattern, and a feeder 12 for receiving an operating power source and transmitting and receiving an ultra-wideband signal.

The ground part 20 of the back surface b is a ground, and inserts a predetermined pattern to adjust the radiation characteristics and the frequency change. In the present invention, as shown in FIG. 1, a streamlined radiation guide arm is provided on the left and right sides with respect to the central axis of the ground portion 20 as the predetermined pattern. This is to have a constant pattern characteristics in a wide band.

The patch-type ultra-wideband antenna 100 will be described in more detail as follows.

FIG. 2 is an exemplary diagram for describing a pattern of an ultra wide band antenna in FIG. 1.

2, first, a detailed description of the pattern of the ultra-wideband antenna of the present invention will be described in the order of the pattern of the elliptical monopole radiator 11 and the ground pattern.

First, reference numeral Px denotes the long axis length of the monopole radiator 11, Py denotes the short axis length of the monopole radiator 11, wherein Px is 17 mm and Py is 12 mm. It relates to a monopole antenna with ultra-wideband characteristics and shows the change in impedance and broadband characteristics of the radiator according to the ratio of long axis to short axis.

Second, the height change of the reference symbol h is a length that acts as a major design variable that determines the matching characteristic, and at the point where the monopole radiator 11 and the ground portion 20 meet energy without loss along the 50 ohm line. Start radiation and have radiation resistance. This is the point where impedance change occurs. That is, the mismatch between the impedance of the monopole radiator unit 10 and the line impedance may be matched to 50 ohms in the ultra-wide band by changing the height. Thus, in the present invention, the height of the reference numeral h is 0.52 mm.

Third, reference numeral G is a length for adjusting a primary resonance frequency of the antenna by adjusting a capacitance value of the ground portion 20. In the present invention, the center of the streamlined radiation guide and the ground portion 20 is adjusted. The outer surface of the shaft is 4.5 [mm] apart.

Fourth, the reference numeral r is the radius length of the inner circle for etching the ground portion 20, the capacitance value is determined accordingly. This leads to a change in the first resonant frequency. Here, the longer the length of r, the lower the primary resonant frequency, because the larger the circle, the more the influence of the value of mutual coupling at the lower frequency. Therefore, in the present invention, the length of r is 3.5 mm.

Fifth, the reference numeral H denotes the height of the ground portion 20, which is 15 mm, and the reference numeral D denotes the width length of the central axis of the ground portion 20, which is 8 mm. Reference numeral I denotes the distance from the radiation guide arm on the left side to the radiation guide arm on the right side, which is 30 mm.

3 and 4 show characteristic graphs of the patch-type ultra-wideband antenna of the present invention having such a configuration.

Figure 3 (a) shows the gain (Gain) of the antenna according to the frequency. Compared with the characteristics of the general monopole antenna, it can be seen that the frequency band 3GHz-10GHz has a gain within 0dB to 3dB.

In addition, Figure 3 (b) shows the return loss of the antenna according to the frequency, which shows how well the energy is transmitted without reflection in the desired frequency band. That is, the frequency range of the reflection coefficient value of -10dB is 3.1 ~ 11.8GHz, which can be seen that accommodates all the frequency bandwidth of 3.1 ~ 10.6GHz required in the ultra-wideband system.

In addition, as can be seen from the radiation characteristics of the antenna according to the frequency shown in Figure 4, it shows the characteristics of an isotropic antenna that is perfectly suited for mobile communication up to 3GHz-9GHz, and maintains an isotropic pattern generally at 10GHz.

In other words, in the present invention, the height of the elliptical monopole radiator 11 made on the RF-4 substrate is approximately 0.4 lambda at 6.8 GHz, and the width is approximately 0.3 lambda. The length of the ground portion 20 is approximately 0.64 lambda, and the inner diameter of the ground portion 20 is 0.35 lambda. In addition, the surface of the radiation guide arm of the ground portion 20 was treated in a streamlined form to have a constant pattern characteristics in a wide band.

In conclusion, the patch type ultra-wideband antenna of the present invention has an isotropic antenna pattern and simultaneously has a wideband characteristic.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by those equivalent to the scope of the claims.

As described in detail above, the present invention has an elliptical monopole radiator, and the ground portion has a streamlined constant pattern, thereby reducing the size of the antenna and having an omnidirectional pattern regardless of frequency. It works.

In addition, there is a variety of effects that can be used as a UWB communication broadband antenna and mobile communication antenna.

Claims (11)

An oval elliptical monopole radiator is printed on the dielectric in an elliptical shape with a long axis of 17 [mm] and a short axis of 12 [mm] with a constant radiation pattern on the front surface of the dielectric, and a feeder for transmitting and receiving ultra-wideband signals by receiving operating power is 1.4 In the patch-type monopole antenna with a specific radiation pattern printed on the front and back of the dielectric consisting of an oval monopole radiator portion and a ground portion printed with a width of [mm]. The ground portion is a patch-type ultra-wideband antenna, characterized in that the ground portion having a streamlined radiation guide arm is printed on the rear surface of the dielectric. delete delete Claim 4 was abandoned when the registration fee was paid. Claim 4 was abandoned when the registration fee was paid. Patch-type ultra-wideband antenna, characterized in that the point where the meeting point with the monopole radiator has a distance of 0.52 [mm]. Claim 5 was abandoned upon payment of a set-up fee. Claim 5 was abandoned upon payment of a set-up fee. A patch type ultra-wideband antenna, comprising a left-right symmetrical structure in which an internal source is etched in consideration of the antenna's primary resonant frequency by adjusting a capacitance value of the ground around a center axis of the ground part. Claim 6 was abandoned when the registration fee was paid. Claim 6 was abandoned when the registration fee was paid. Patch type ultra-wideband antenna, characterized in that the radius is 3.5 [mm]. Claim 7 was abandoned upon payment of a set-up fee. Claim 7 was abandoned upon payment of a set-up fee. Patch-type ultra-wideband antenna, characterized in that having a radius of 6.5 [mm] from the center of the inner source to the outer surface of the radiation guide arm. Claim 8 was abandoned when the registration fee was paid. Claim 8 was abandoned when the registration fee was paid. A patch type ultra wide band antenna, characterized in that the height is 15 [mm]. Claim 9 was abandoned upon payment of a set-up fee. Claim 9 was abandoned upon payment of a set-up fee. A patch type ultra wide band antenna, characterized in that the straight length of the central axis width is 8 [mm]. Claim 10 was abandoned upon payment of a setup registration fee. Claim 10 was abandoned upon payment of a setup registration fee. Claim 11 was abandoned upon payment of a setup registration fee. Claim 11 was abandoned upon payment of a setup registration fee. Patch-type ultra-wideband antenna, characterized in that the maximum length between the symmetric streamline radiation guide arm in the form of the outermost wing on the left is 30 [mm].

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