Band-notched UWB antenna with reflection zero

Abstract

The invention discloses a band-notched UWB antenna with reflection zeros. A pair of bandpass piles formed by two lambada4/4 open-circuit lines and a pair of band-stop piles formed by two lambada3/4 open-circuit lines are introduced into traditional band-notched UWB antennae. A pair of nodes which is symmetrical with a microstrip line feeder of a round monopole as the axis of symmetry is arranged on the round monopole of the antenna; the open-circuit lines in the band-stop piles are all distributed along the edge of the round monopole; the two lambada3/4 open-circuit lines and the two lambada4/4 open-circuit lines are respectively symmetrical with the microstrip line feeder of the round monopole as the axis of symmetry; the microstrip line feeder of the round monopole is taken as the axis of symmetry; one ends of the lambada3/4 open-circuit lines and the lambada4/4 open-circuit lines at any side of the two sides of the axis of symmetry are short-connected on the round monopole by a symmetrical node at the side; lambada3 is the wavelength corresponding to the frequency of a reflection pole; lambada4 is the wavelength corresponding to frequencies of the two reflection zeros, and lambada4 is less than or equal to lambada3. The band-notched UWB antenna of the invention is controllable in frequency domain characteristics, simple in manufacturing, low in cost and convenient in use.

Description

technical field [0001] The invention relates to the technical field of antennas, in particular to a banded UWB antenna with a reflection null. Background technique [0002] Currently, Personal Area Networks (PANs) are regarded as the core of future fourth-generation wireless communication systems. Among them, ultra-wideband (UWB) technology has become an important means of realizing personal area network because of its strong anti-interference ability, extremely fast transmission rate, large system capacity, low power consumption and low cost. Since the UWB technology has not been registered by the telecommunications management department, the working frequency band defined by the Federal Communications Commission (FCC) of the United States belongs to the shared frequency band, which includes the registered system frequency band, such as WLAN802.11a is an example. In order to avoid unnecessary legal disputes, the current UWB system often needs to adopt a filter structure to...

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Problems solved by technology

However, the stop band transition band produced by this method is often very wide, often exceeding 1GHz when the standing wave ratio is 2, and the frequency band below the standing wave ratio of 3 is often as wide as 0.5GHz, and the frequency band above the standing wave ratio of 10 The frequency band is often within 400MHz, which is very uneconomical as a narrowband filter structure, and it is easy to cause further unnecessary attenuation of the already tense pulse power

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