Abstract:
Eine Antenne (1) verfügt über zwei Antennenelemente (3, 5), welche miteinander verbunden sind. Das zweite Antennenelement (5) ist mit einem Funkgerät (2) verbindbar. Das erste Antennenelement (3) und das zweite Antennenelement (5) bilden gemeinsam eine erste Teil-Antenne. Das zweite Antennenelement (5) bildet alleine eine zweite Teil-Antenne. Das erste Antennenelement (3) besteht zumindest zum Teil aus zumindest einem flexiblen Metallband. Das zweite Antennenelement (5) besteht zumindest zum Teil aus einem flexiblen Wellrohr.
Abstract:
Techniques, apparatus and systems that use composite left and right handed (CRLH) metamaterial structures to combine and divide electromagnetic signals at multiple frequencies. The metamaterial properties permit significant size reduction over a conventional N-way radial power combiner or divider. Dual-band serial power combiners and dividers and single-band and dual-band radial power combiners and dividers are described.
Abstract:
Techniques and apparatus based on metamaterial structures are provided for antenna and transmission line devices, including multilayer metallization metamaterial structures with one or more conductive vias connecting conductive parts in two different metallization layers.
Abstract:
Chaque antenne à onde de sol du réseau comprend un plan de masse (PMl, PM2) enfoui sensiblement horizontalement à proximité et sous la surface du sol (S) et une ligne d'excitation métallique (LE 1 , LE 2 ) s 'étendant sensiblement rectilignement et parallèlement au-dessus du plan de masse et à au moins à 1 m environ du sol pour rayonner des ondes de sol hectométriques ou kilométriques. Le réseau comprend au moins un moyen d'interconnexion (LR) reliant des première et deuxième antennes consécutives du réseau pour alimenter la deuxième antenne avec une puissance non rayonnée par la première antenne représentant environ 90% de la puissance fournie à la première antenne. Chaque antenne est adaptée à son impédance caractéristique pour rayonner des ondes progressives. Une ligne de retour souterraine inverseuse de phase (LR) peut remettre en phase les ondes propagées par deux antennes consécutives.
Abstract:
There is herein disclosed a miniature antenna with an adjustable resonant frequency without any change of the radiation performance, and an apparatus including the same. The antenna comprises two radiation conductors connected to a feed section and a ground plane, respectively, and a resonant circuit section as a zero-order resonator including inductors, transmission lines and a capacitor. The inductors and/or capacitor are configured of a variable element so that the impedance of the variable element can be controlled to adjust the resonant frequency of the antenna. In addition, the installation position and the size of the ground plane within the apparatus with respect to the transmission lines can also be controlled to adjust the resonant frequency of the antenna. Alternatively, the antenna may further comprise a variable capacitor connected to the inductors so as to adjust the effective inductance and change the resonant frequency. The radiation lines of the antenna are not related with determination of the resonant frequency, and thus the radiation performance is not affected by the adjustment of the resonant frequency.
Abstract:
An internal monopole antenna especially intended for flat radio devices. The radiator (320) of the antenna is for the most part in one geometrical plane, forming thus a radiation plane. A planar and conductive ground element (330) is added to the antenna below the radiating plane and parallel with it. This is galvanically connected to the ground plane (310) of the radio device through an inductive element (335), which has relatively high impedance at the operating frequencies of the antenna. The radiator has preferably two branches for forming separate operating bands. The antenna is pretuned upwards so that the effect of both the user's tissues and the ground element, which lowers the resonance frequencies, is taken into account. The antenna is installed in the radio device so that in the operating position of the device it is as far as possible from the user's head with the ground element toward the user. The efficiency of the antenna is relatively good when the device is beside the user's head, the SAR value being small at the same time. In addition, the space between the radiator and the ground element can be utilized by placing other components of the radio device in it.
Abstract:
An adjustable monopole antenna especially intended for the mobile terminals. The adjusting circuit (930) of the antenna is located between the radiator (920) and the antenna port of a radio device and forms, together with the antenna feed conductor (901), a feed circuit. This circuit comprises an adjustable reactance between the feed conductor and the ground in series with the feed conductor or in both of those places. For example, the feed conductor can be connected by a multi-way switch to one of alternative transmission lines, which are typically short-circuited or open at their tail end and shorter than the quarter wave, each line acting for a certain reactance. The antenna operating band covers at a time only a part of the frequency range used by one or two radio systems, in which case the antenna matching is easier to arrange than of a real broadband antenna. The space required for both the radiator and the adjusting circuit is relatively small. There is no need to arrange a coupling to the radiator for the antenna adjusting, which means a simpler antenna structure and thus savings in production costs.
Abstract:
본 발명은 광대역 및 다중대역(Multi-Band) 특성을 갖도록 설계된 소형의 옴니 안테나에 관한 것이다. 본 발명의 옴니 안테나는 방사소자부와 반사판 및 급전 컨넥터를 포함한다. 특히 상기 방사소자부는 절곡판의 중심을 이루는 급전부와, 상기 급전부의 일측 및 타측에서 상향 절곡 형성되는 저주파 및 고주파 방사패치를 일체로 포함한다. 본 발명에 따르면 상기 방사소자부는 단지 하나의 절곡판을 이용하여 간단하게 제작된다. 따라서 본 발명에 따르면, 옴니 안테나를 제작함에 있어서 구조를 극단적으로 단순화함으로써 조립공정 및 원가구조를 개선하는 월등한 효과가 있다.
Abstract:
An adjustable monopole antenna intended especially for mobile terminals. About halfway along the monopole radiator (310) there is an adjusting point (AP), from which a conductor (315) is branched to the adjusting circuit (340) of the antenna. The adjusting circuit comprises a switch (SW) and alternative reactive elements (X1–XN) connected to the ground (GND), selectable by the switch. When a reactive element is changed, the electric length and resonance frequency of the whole radiator change, in which case the corresponding operating band shifts. If the antenna is made a dual-band one, the above-mentioned operating band is the lower one of them. The higher operating band again is based e.g. on radiating slots (SL1, SL2) implemented by the same radiator conductor and a possible separate parasitic radiator (320). The operating band of the antenna below the frequency 1 GHz can be shifted in a wider range than in the corresponding known antennas.