Review Article
Review on the Millimeter-Wave Generation Techniques Based on Photon Assisted for the RoF Network System
Table 2
Comparison of different mm-wave generation schemes [
5].
| Schemes | Advantages | Disadvantages |
| DML [18, 22] | (i) Simple structure (ii) Low cost | (i) Low frequency (ii) Frequency chirping | External modulation [23, 27, 30] | Single modulator | (i) Simple structure (ii) Low cost (iii) MMW good performance | (i) Frequency limitation (ii) Insertion loss | Multiple modulators | (i) High frequency (ii) MMW good performance | (i) Complicated structure (ii) High insertion loss | Optical heterodyne [31, 34] | (i) Simple configuration (ii) Low cost (iii) Frequency generation flexibility | (i) Complicated light source (ii) Frequency instability (iii) Phase noise |
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