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1 With the helical antenna and a V-shaped plate antenna as a unit antenna and the second-order hexagon as the array, the antennas are integrated and simulated and get the low side-lobe characteristics.

2 A new half spherical helical antenna at the taper mode is presented first time. It has smaller volume and provides good shaped pattern which is suitable for LEO satellite communication.

3 At last, the radiated field of axial-mode helical antenna and double ridged horn antenna is analyzed at this paper.

4 The two-arm hemispherical helical antenna has very wide impedance and pattern bandwidth, and its gain in the whole band is larger and wave mildly, which show that it is of great applicat...

5 The two-arm hemispherical helical antenna has very wide impedance and pattern bandwidth, and its gain in the whole band is larger and wave mildly, which show that...

6 A helical antenna is a specialized antenna that emits and responds to electromagnetic fields with rotating (circular)polarization.

7 Helical antenna satisfies the demand for the stubby antenna miniaturization. It has a rapid development in recent years.

8 Helical antenna has not only almost identical to the resistive input impedance in broad bandwidth, but also works by the end of super-gain front lobed map in the same frequency band.

9 This paper chooses a normal mode helical antenna to replace the short dipole antenna to improve efficiency.

10 The content of the graduation paper is to design and simulate the helical antenna.

11 The analysis results indicate that the impedance and pattern bandwidths of the one-arm hemispherical helical antenna are relatively narrow, and its gain varies acutely in the whole band.

12 A fast algorithm is investigated for calculating the electric characteristics of a helical antenna, and the broadband miniature helical antenna is designed by Genetic Algorithm (GA).

13 The utility model provides a radio-frequency identification super-high frequency helical antenna which relates to a radio-frequency identification system.

14 There are all kinds of antennas used in EMC test such as biconical antennas, log periodic antenna, helical antenna,(www.Sentencedict.com) ridged horn antenna and etc.

15 According to the main technical requirements of GPS receiving antenna on satellite, the design and the test results for resonant quadrifilar helical antenna are given.