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1. Inflight measurement of antenna pattern is a key technology of spaceborne SAR calibration.

2. A beam shaping algorithm for circular arrays antenna pattern based on adaptive antenna array theory is presented.

3. Weighting effect of real antenna pattern will improve the SNR in MP.

4. The test of antenna pattern is a key activity in developing a low or ultra-low sidelobe antenna, it calls for positive involvement of structural designer in it.

5. The module's internal circuitry is connected to the antenna pattern via inductive coupling .

6. Alternatively, a transfer paper with the antenna pattern printed thereon may be attached to the inner surface of the terminal device.

7. The antenna pattern computer - simulation is a important part of antenna system optimization design and simulation.

8. Measuring system for antenna pattern was developed based on analysis of measurement principle.

9. Specifically include the followings:Radiometric calibration1. Antenna Pattern in-orbit testing program.

10. An actual radar antenna pattern plotted by using the method shows approximately no difference from the practically measured results based on solar noise.

11. The antenna pattern error is the main error of effecting target radiometric properties. Distributed spaceborne SAR operates with the transmitter and receiver is spatially separated.

12. The testing result of one conical scan radar antenna pattern is given.

13. Aimed at the difficulty in calculating an electrically large size antenna by using MOM,(sentencedict.com) a far zone approximate method based on MOM(MOM-FZ) was presented for calculating radar antenna pattern.

14. Then based on this design, varactor diode is adopted in the reconfigurable antenna, and continuous alteration of antenna pattern and gain is achieved.

15. Finally, the eff of the increase in the auxiliary antenna weight coefficients on the main antenna pattern is also discussed.

16. In this paper, with the relationship between received signal space and scene space, the effect of the antenna pattern on the system performance is discussed using the imaging model.

17. At the beginning of this paper, some knowledge about antenna pattern and simulation methods will be introduced, and complex ray theory(CRT) will be discussed in detail.

18. By simulation results, it shows that the main lobe ofpattern can point to the direction of arrival of target user accurately, and the antenna pattern can minimize interfering signals actively.

19. Based on the principles that lateral offset-focus feed makes the antenna pattern deflect an angle, the multi-beam antenna can be used in passive imaging system.

20. The wide accumulating azimuth angle is one of the main characteristics of low frequency UWB SAR, so the effect of the antenna pattern on the system performance cannot be neglected.

21. At this time, a mask member having the same shape as that of the antenna pattern is further provided.

22. A diversity antenna system in a mobile unit which provides time, space and antenna pattern diversity to mitigate the effects of fading at a CDMA mobile unit.

23. A double population genetic algorithm (DPGA) is presented and applied to synthesize the array antenna pattern by controlling only the current amplitudes.

24. Numerical results of analysis and optimization show that the peak matching method is an accurate and practical approach for antenna pattern simulation.