NOISE FILTER

• Main Authors: HIROSE KENJI, SASAKI YUICHI, WATANABE YOSUKE, OHASHI HIDEMASA, YONEDA SATOSHI, OKA NAOTO
• Format: Patent
• Language: English; Japanese
• Published: 26.01.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE; WAVEGUIDES

PROBLEM TO BE SOLVED: To provide a noise filter that can be easily fitted to an existing transmission line and exert a high noise suppression effect.SOLUTION: A noise filter 1A includes a main body portion 10 for covering the outer circumferential surface of a transmission line 2, and a grounding connection conductor 11A for connecting the main body portion 10 to a conductor surface 3. The main body portion 10 includes a short-circuited portion E1a which is electrically short-circuited with the conductor surface 3, an open end E1b located away from the short-circuited portion E1a in the longitudinal direction of the main body 10, and a conductive portion interposed between the open end E1b and the short-circuited portion E1a to configure a quarter wavelength resonator.SELECTED DRAWING: Figure 2 【課題】既存の伝送線路に簡便に取り付けられ、高いノイズ抑制効果を発揮し得るノイズフィルタを提供する。【解決手段】ノイズフィルタ１Ａは、伝送線路２の外周面を被覆する本体部１０と、本体部１０を導体面３に接続する接地用接続導体１１Ａとを備える。本体部１０は、導体面３と電気的に短絡している短絡部分Ｅ１ａと、短絡部分Ｅ１ａから当該本体部１０の長手方向に離れた位置にある開放端Ｅ１ｂと、開放端Ｅ１ｂと短絡部分Ｅ１ａとの間に介在する導電部分とを有することにより４分の１波長共振器を構成する。【選択図】図２