Frequency-Tunable Graphene Patch Antenna in Terahertz Regime

Yuan Yuan; Yanan Xie; Xin Li

doi:10.3788/AOS201838.0216001

Journals >Acta Optica Sinica >Volume 38 >Issue 2 >Page 0216001 > Article

Acta Optica Sinica
Vol. 38, Issue 2, 0216001 (2018)

Frequency-Tunable Graphene Patch Antenna in Terahertz Regime

Yuan Yuan^1、2, Yanan Xie^1、2、*, and Xin Li^1、2

Author Affiliations

¹ Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China

² School of Communication & Information Engineering, Shanghai University, Shanghai 200444, China;

show less

DOI: 10.3788/AOS201838.0216001 Cite this Article Set citation alerts

Yuan Yuan, Yanan Xie, Xin Li. Frequency-Tunable Graphene Patch Antenna in Terahertz Regime[J]. Acta Optica Sinica, 2018, 38(2): 0216001 Copy Citation Text

show less

Fig. 1. Surface conductivity versus chemical potential of graphene at room temperature

Download full size

Fig. 2. Relationship between bias electric field and chemical potential at εb=3.5 F/m

Download full size

Fig. 3. Equivalent circuit model of rectangular microstrip antenna

Download full size

Fig. 4. Input resistance curve of graphene patch antenna

Download full size

Fig. 5. Input reactance curve of graphene patch antenna

Download full size

Fig. 6. Top view of frequency-reconfigurable graphene antenna

Download full size

Fig. 7. Left view of frequency-reconfigurable graphene antenna

Download full size

Fig. 8. Return loss of antenna

Download full size

Fig. 9. Radiation patterns of graphene antenna under different resonance frequencies. (a) 695.55 GHz; (b) 698.10 GHz; (c) 701.55 GHz; (d) 703.15 GHz; (e) 705.05 GHz

Download full size

Fig. 10. Chemical potential versus resonance frequency

Download full size

Component	Parameter	Value /μm
Patch	Length L	98.5
Patch	Width W	133.2
Microstrip line	Length L'₁	16.98
	Length L'₂	30
	Length L'₃	13
	Width W'₁	6
	Width W'₂	6
	Width W'₃	20
Substrate (polyimide)	Length L_s	210
	Width W_s	433.5
	Height h	18
Silicon	Height h₁	0.525

Table 1. Parameters of frequency-reconfigurable graphene antenna

Resonance frequency /GHz	Chemical potential /eV	Absolute impedance bandwidth /GHz	Relative impedance bandwidth /%	Maximum radiation gain /dB	Directivity factor /dB	Radiation efficiency /%
695.55	0	678.25-713.65	5.08	5.82	8.01	72.56
698.10	0.1	680.75-715.95	5.04	6.33	8.02	79.00
701.55	0.25	685.10-718.55	4.77	6.66	8.01	83.10
703.15	0.45	687.05-720.05	4.70	6.80	8.01	84.80
705.05	1	689.95-721.75	4.63	6.92	8.01	86.48

Table 2. Radiation performances of frequency-reconfigurable graphene antenna

$\begin{matrix} {f_{res}}_{} \end{matrix}$ /GHz	$\begin{matrix} {μ_{c}}_{} \end{matrix}$ /eV	$\begin{matrix} {G_{s 1}}_{} \end{matrix}$ /μS	$\begin{matrix} {G_{s 2}}_{} \end{matrix}$ /mS	$\begin{matrix} {C_{s 1}}_{} \end{matrix}$ /aF	$\begin{matrix} {C_{s 2}}_{} \end{matrix}$ /fF	C /fF
695.55	0	11.7072	1.0598	409.10	2.3689	1.3
698.10	0.1	11.7946	1.0677	408.99	2.3387	0.2
701.55	0.25	11.9107	1.0782	408.85	2.3278	0.9
703.15	0.45	11.9610	1.0827	408.79	2.3240	0.9
705.05	1	12.0286	1.0889	408.71	2.3212	0.9

Table 3. Parameters in equivalent circuit of frequency-reconfigurable graphene antenna

Parameter	Ref. [11]		Ref. [23]	Ref. [24]	Ref. [25]	Ref. [26]
Resonance frequency /GHz	750	770	6000	1500	720	1425	1325
Impedance bandwidth /%	6.67	6.67	12.83	-	13.36	-	-
Maximum radiation gain /dB	5.09	5.07	3.27	0	3.852	-	-
Directivity factor /dB	5.71	5.70	7.56	-	6.456	-	-
Radiation efficiency /%	86.58	86.43	37.17	-	54.9	43	44.5

Table 4. Radiation performances of existing antennas from different references

Yuan Yuan, Yanan Xie, Xin Li. Frequency-Tunable Graphene Patch Antenna in Terahertz Regime[J]. Acta Optica Sinica, 2018, 38(2): 0216001

Download Citation

Set citation alerts for the article

Tools

Set citation alerts for the article

Save the article for my favorites

Paper Information