......DE....FRGB..IT......SE......................R0467224EUROPEAN PATENT APPLICATIONA319920701EP91111588.919910712enenen188953/9019900717JP188955/9019900717JP188956/9019900717JP191181/9019900718JP191182/9019900718JP19920701199227199201221992045 5H 05B 6/80 A 5H 05B 6/68 BdeHochfrequenzheizgerät und elektromagnetischer Wellendetektor zum Gebrauch im HochfrequenzheizgerätenHigh frequency heating apparatus and electromagnetic wave detector for use in high frequency heating apparatusfrAppareil de chauffage haute-fréquences et détecteur d'ondes électromagnétiques utilisé dans l'appareil de chauffage haute-fréquences2MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.00216883M 20911006, Oaza KadomaKadoma-shi, Osaka-fu, 571JPYoshino, Koji, Takanohara Eki Nishi Danchi 4-4061-2, Kabutodai, Kizu-choSoraku-gun, Kyoto-fuJPKashimoto, Takashi65-3, Higashimachi, HokkejiNara-shi, Nara-kenJPYamaguchi, Kimiaki2-1-29, Omiya-choNara-shi, Nara-kenJPYota, MasatoHeijo Dai-1 Danchi 12-509, 1-6, JinguNara-shi, Nara-kenJPSakai, ShinichiShoairyo, 376, Tsutsui-choYamatokoriyama-shi, Nara-kenJPMoriyama, Satomi103, Takabata-choNara-shi, Nara-kenJPEisenführ, Speiser & Partner00100151Martinistrasse 2428195 BremenDEDEFRGBITSE19920701199227

57 A high frequency heating apparatus and an electromagnetic wave detector for use in the high frequency heating apparatus, which are so arranged to estimate the state of a food article placed in a heating chamber through detection of microwaves within the heating chamber. By devising a position of an antenna and a method of processing signals of the microwaves as detected, it becomes possible to effect detection of microwaves extremely stably and at high reliability.