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Ultra-wideband antenna having a band notch characteristic

An ultra-wideband antenna and band-rejection technology, applied in antennas, coastline protection, construction, etc., can solve problems such as performance degradation, pulse distortion, and limit equipment miniaturization and weight reduction, and achieve the effect of small size and light weight

Inactive Publication Date: 2008-04-16
E M W ANTENNA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, adding a band-stop filter not only increases the cost, but also limits the miniaturization and weight of the device
Adding a bandstop filter can also cause pulse distortion in UWB systems using very short pulses, resulting in reduced performance

Method used

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  • Ultra-wideband antenna having a band notch characteristic

Examples

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Embodiment Construction

[0055] The present invention will be described in detail below in conjunction with specific embodiments with reference to the accompanying drawings. But while specific shapes and associated values ​​for the antennas are disclosed, it should be understood that they are illustrative only. The described embodiments may be modified in various ways, all without departing from the spirit or scope of the invention.

[0056] 1 and 2 are top and bottom views of a UWB antenna according to one embodiment of the present invention.

[0057] The antenna of the present embodiment is basically a microstrip patch antenna, and it includes a substrate 12, a circular radiating element 10 formed on the top surface of the substrate, a feeding element 14 connected to the radiating element 10, and a circular radiating element 10 formed on the top surface of the substrate. ground plate 20 on the bottom surface of the substrate. An inverted U-shaped groove 16 is formed in the radiating element 10 . ...

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PUM

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Abstract

The present invention discloses an antenna for ultra- wideband (UWB) communication having a band-stop characteristic. According to an embodiment of the present invention, the UWB antenna is a patch antenna employing microstrip feeding. In order to expand a bandwidth at a low frequency band, a stub is formed in a radiating element. Furthermore, since steps are formed in a ground plane, an antenna characteristic at an intermediate frequency band can be improved and a UWB characteristic can be obtained. According to another embodiment of the present invention, the UWB antenna is a patch antenna employing microstrip feeding and has a recess formed in the ground plane, thereby implementing the UWB characteristic. The antenna of the present invention has an inverse U-shaped slot formed in the radiating element, thus implementing the band-stop characteristic at the UNII band. In addition, the antenna of the present invention has includes a ground plane having a small area and has omnidirectional radiating patterns accordingly.

Description

technical field [0001] The invention relates to an antenna for an ultra-wideband (UWB) communication system, and in particular to a UWB antenna with band-rejection characteristics in the 5GHz frequency band. Background technique [0002] A UWB communication system is defined as a communication system having a bandwidth of 25% or higher of a center frequency, or 1.5 GHz or higher. UWB communication uses a signal whose power is distributed over a wide band, such as a pulse signal. That is, a pulse having a width (duration) of several nanoseconds to picoseconds is used in order to distribute power over a wide band on the order of GHz. The UWB communication mechanism is a communication mechanism that has a much wider bandwidth than the wideband CDMA communication mechanism of about 5 MHz. [0003] In UWB communication systems, signals are modulated to convey information using short pulses. Use modulation methods such as On-Off Keying (OOK), Pulse Amplitude Modulation (PAM), o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q13/08
CPCA01G9/025E02B3/14E02D17/205E02D29/025E02D29/0266E02D2600/20
Inventor 柳秉勋成元模崔在薰崔佑荣卢良云
Owner E M W ANTENNA CO LTD
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