JPS62191207U - - Google Patents

Description

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来のダイポールアンテナにおける２
周波共振アンテナの構造図、第２図は従来のダイ
ポールアンテナにおける２周波共振アンテナのイ
ンピーダンス特性図、第３図は本考案によるプリ
ントダイポールアンテナの一実施例を示す図、第
４図は本考案の△Ｓに対する反射減衰量特性の例
を示す図、第５図は本考案の無給電素子の長さ、
幅に対する共振周波数特性の例を示す図、第６図
および第７図は本考案の無給電素子付きプリント
ダイポールアンテナの水平面内指向性測定結果の
例を示す図、第８図は本考案の無給電素子の幅に
対する反射減衰量特性の例を示す図、第９図は本
考案の無給電素子を三角形にした場合の反射減衰
量特性の例を示す図、第１０図は本考案の無給電
素子を半楕円形にした場合の反射減衰量特性の例
を示す図である。 １，１′……ダイポールアンテナの励振素子、
２……ダイポールアンテナの無給電素子、３，３
′……プリントダイポールアンテナの励振素子、
４……無給電素子、５……基板、６……給電端子
、７……三角形の無給電素子、８……半楕円形の
無給電素子。 Figure 1 shows 2 in a conventional dipole antenna.
A structural diagram of a frequency resonant antenna, Fig. 2 is an impedance characteristic diagram of a two-frequency resonant antenna in a conventional dipole antenna, Fig. 3 is a diagram showing an embodiment of a printed dipole antenna according to the present invention, and Fig. 4 is a diagram showing an example of a printed dipole antenna according to the present invention. A diagram showing an example of return loss characteristics with respect to ΔS, FIG. 5 shows the length of the parasitic element of the present invention,
Figures 6 and 7 are diagrams showing examples of the horizontal plane directivity measurement results of the printed dipole antenna with a parasitic element of the present invention, and Figure 8 is a diagram showing an example of the resonant frequency characteristics with respect to the width. A diagram showing an example of the return loss characteristic with respect to the width of the feed element, FIG. 9 is a diagram showing an example of the return loss characteristic when the parasitic element of the present invention is triangular, and FIG. 10 is a diagram showing an example of the return loss characteristic with respect to the width of the parasitic element of the present invention. FIG. 7 is a diagram showing an example of return loss characteristics when the element is shaped into a semi-ellipse. 1, 1'...Dipole antenna excitation element,
2...Passive element of dipole antenna, 3,3
′...excitation element of printed dipole antenna,
4... Parasitic element, 5... Substrate, 6... Power feeding terminal, 7... Triangular parasitic element, 8... Semi-elliptic parasitic element.

Claims (1)

【実用新案登録請求の範囲】 (1) 誘電体基板に構成された１／２波長プリン
トダイポールアンテナの起電点付近に、素子の長
さが該１／２波長プリントダイポールアンテナの
素子開口長より短く、電界軸に平行な無給電素子
を配設し、前記１／２プリントダイポールアンテ
ナによつて第１の周波数に共振せしめると共に、
前記無給電素子の長さの変化によつて第１の共振
周波数より高い任意の第２の周波数に共振せしめ
たことを特徴とするプリントダイポールアンテナ
。 (2) 無給電素子の幅を変えることによつて使用
周波数帯域を広帯域化した実用新案登録請求の範
囲第１項記載のプリントダイポールアンテナ。[Scope of Claim for Utility Model Registration] (1) Near the electromotive point of a 1/2 wavelength printed dipole antenna constructed on a dielectric substrate, the length of the element is longer than the element aperture length of the 1/2 wavelength printed dipole antenna. A parasitic element that is short and parallel to the electric field axis is arranged, and is resonated at a first frequency by the 1/2 printed dipole antenna, and
A printed dipole antenna characterized in that the parasitic element is caused to resonate at an arbitrary second frequency higher than the first resonance frequency by changing the length of the parasitic element. (2) The printed dipole antenna according to claim 1 of the utility model registration claim, in which the frequency band used is widened by changing the width of the parasitic element.