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| Content Provider | IET Digital Library |
|---|---|
| Author | Fartookzadeh, Mahdi Armaki, Seyed Hossein Mohseni |
| Abstract | In this study, a new straightforward method for construction of the printed quadrifilar helical antennas is presented. Folded helices with square shapes are used as the arms of the proposed antenna for satellite applications. The proposed structure is consisting of four printed flat walls with similar patterns of arms on each wall. Patterns of the folded arms are printed on four flat substrates with removed ground layers and the antenna structure is obtained by connecting these substrates. Two versions of the proposed antennas are designed for operating at 435 MHz with isolated and connected arms. Both antennas have minor responses at 145 MHz; however the large antenna with connected arms has better results. In addition, the large antenna has wider bandwidth and higher gain at both operating frequencies. Furthermore, the proposed antenna can be used as a wideband antenna with 34% bandwidth. |
| Starting Page | 1780 |
| Ending Page | 1785 |
| Page Count | 6 |
| ISSN | 17518725 |
| Volume Number | 12 |
| e-ISSN | 17518733 |
| Issue Number | Issue 11, Sep (2018) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-map/12/11 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-map.2017.1020 |
| Journal | IET Microwaves, Antennas & Propagation |
| Publisher Date | 2018-03-20 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Antenna Radiation Pattern Antenna Structure Connected Arms Flat Substrates Folded Arms Folded Helices Frequency 145 MHz Frequency 435 MHz Helical Antenna Isolated Arms Microstrip Antenna Printed Flat Walls Printed Quadrifilar Square-helical Antenna Satellite Antenna Satellite Application Satellite Communication System Single Antenna Square Shapes UHF Antenna VHF Antenna |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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