Source google image: https://www.researchgate.net/publication/233975622/figure/fig2/AS:213996901801985@1428032245195/Frequency-domain-plot-of-a-comblet-with-one-tooth.png
Comblet
Source google image: https://www.researchgate.net/publication/233975622/figure/fig2/AS:213996901801985@1428032245195/Frequency-domain-plot-of-a-comblet-with-one-tooth.png