| Autor: |
Raul Arruela, Diogo Marinho Marinho, Tiago Varum, Joao Nuno Matos |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
IEEE Access, Vol 8, Pp 212855-212864 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2169-3536 |
| DOI: |
10.1109/ACCESS.2020.3040701 |
| Popis: |
Vector modulators (VM) and phase shifters are essential components in phased array antennas with electronic beam steering. This work presents an IQ reflection-type vector modulator using PIN diodes, designed and implemented to operate at 28 GHz. An extensive characterization was carried out, especially concerning bandwidth and input/output return losses. This modulator is capable of producing a 360° phase shifting with a minimum attenuation of 14 dB at 28 GHz, and has a measured bandwidth of 3.6 GHz. A digital control system for the vector modulator was also developed, allowing to obtain pre-selected constellations points, with a measured 0.4 dB of maximum absolute error in amplitude and 2.6° in phase. Additionally, the designed VM was employed in a practical application, where analog beamforming is implemented in a 4 × 4 transmitter phased array allowing to perform a complete electronic control of the radiation pattern of the array. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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