Development of Rogers RT/Duroid 5880 Substrate-Based MIMO Antenna Array for Automotive Radar Applications

Table 2

Comparison of the existing works with the proposed work.

Reference paper	Antenna array	Total size (mm^2)	Frequency (GHz)	Gain (dBi)	Reflection coefficient (dB)	No. of bands
Aulia et al. [4]	(1) 10 × 4 patch antenna array	20.43 × 7.83	77	19.8	−21.98	Single
	(2) 12 × 4 leafy patch antenna array (with a proposed waveguide to microstrip feeding technique)	16.72 × 10.75		19.6	−11.17
F D L Peters et al.	10-element patch antenna array with Wilkinson power divider	<0.9 cm^2	77	22	−18	Single
Oh-Yun Kwon et al.	4 × 4 patch array (with single input)	16.3 × 24 (one transmitter or receive array)	77	11.8	(1) −18	Single
					(2) <−25
Ushemadzoro Chipengo et al. [5]	5-element serial-fed array as TX antenna	—	77	−15 dB	−30	Single
	4-column/5-element serial-fed array as RX antenna			−20 dB
Joerg Scho et al. [7]	8-column/12-row array	—	—	Approx. 15 dBi	—	Single
Wang Wei and Xuetian Wang	8-row/6-unit series-fed weighted antenna array with Wilkinson 1:8 unequal divider	50 × 30	77	—	−15	Single
Manoj Sharma et al.	2 × 2 MIMO with slotted patches and DGS	40 × 6	24	9.8	−18	Single
Proposed	2 × 2 MIMO with CSRR	22.5 × 20.6	24 & 77	11.8 at 24 GHz		Dual
				11.3 at 77 GHz