A dielectrically loaded multi-filar helical antenna comprises coextensive generally helical conductive elements 10A-D formed on the surface of a ceramic cylindrical core 12 formed substantially of solid dielectric material. An impedance matching connection structure, to feed nodes of the antenna, is ...
专利名称：Helical antenna and helical antenna array 发明人：Masataka Yasukawa,Akio Funae,Koji Yano 申请号：US10201253 申请日：20020724 公开号：US06816126B2 公开日：20041109 专利内容由知识产权出版社提供 专利附图：摘要：A small and light helical antenna, with a high gain, includes arranging the diel...
The proposed antenna structure is suitable to be integrated with electronic circuits for different applications. An optimization for different parameters of the antenna for wideband end-fire radiation characteristics is investigated. The antenna has matching impedance bandwidth of 48% with maximum gain of...
A small and light helical antenna, with a high gain, includes arranging the dielectric cylinder with a helix conductor on the conductive plate and arranging a thin rectangular conductive plate between the lower end of the helix conductor and the feed point in a predetermined position of the condu...
For antenna sizes of 0.03-0.05 wavelengths, antenna gains of about-0.5 dBd were achieved. The calculated results were verified using an actual antenna (size, 0.04 wavelengths). A tap feed structure was used for impedance matching. It was shown that very precise design results could be achieved...
In this paper, the design concept of a rectangular normal mode helical antenna is explained. And calculated and measured antenna input impedance and gain are shown in the metal proximity condition. High antenna gain of 2.06dBd is ensured. Next, the antenna structure capable of matching to an IC...
Helical antenna array with resonant cavity and impedance matching means An antenna is formed of four arrays each having sixteen helical antenna elements with probes located within a common resonant cavity. Thus cavity is used to combine all the outputs of elements.< P>< P>The elements of array...
Handset quadrifilar helical antenna mechanical structuresA quadrifilar helical antenna comprising two pairs of filars having unequal lengths and phase quadrature signals propagating thereon. A disk-like impedance matching element disposed at a lower end of the antenna matches a source impedance to an ...
关键词: dipole antennas helical antennas impedance matching microstrip antennas planar antennas GSM1800/1900 bands Q factor folded helical dipole integrated antenna miniaturization miniaturized integrated folded helical antennas 会议名称: Antennas and Propagation (APSURSI), 2011 IEEE International Symposium on ...
The miniature PCB helical antenna is more compact (19 mm x 11 mm) with approximately quarter of the size of the DN024 [1] but requires matching components since the impedance is far from 50 ohms (868 MHz: 10-j88; VSWR 22). When the miniature helical antenna is matched then the ...