© The Institution of Engineering and Technology
New three-dimensional (3D) printing techniques enable the integration of an antenna directly onto the package of a small wireless sensor node. This volume-filling approach ensures near-optimal bandwidth performance of the small antenna, increasing a system's battery life, data rate or range. Simulated results show that the fabricated spherical antenna's bandwidth-efficiency product is more than half of the fundamental limit and radiation pattern measurements exhibit a dipole pattern with −0.7 dBi gain.
References
-
-
1)
-
10. Vandenbosch, G.A.E.: ‘Reactive energies, impedance, and Q factor of radiating structures’, IEEE Trans. Antennas Propag., 2010, 58, (4), pp. 1112–1127 (doi: 10.1109/TAP.2010.2041166).
-
2)
-
5. Adams, J.J., Duoss, E.B., Malkowski, T.F., Motala, M.J., Ahn, B.Y., Nuzzo, R.G., Bernhard, J.T., Lewis, J.A.: ‘Conformal printing of electrically small antennas on three-dimensional surfaces’, Adv. Mater., 2011, 23, (11), pp. 1335–1340 (doi: 10.1002/adma.201003734).
-
3)
-
K.K. O
.
On-chip antennas in silicon ICs and their application.
IEEE Trans. Electron Devices
,
7 ,
1312 -
1323
-
4)
-
4. Friedrich, A., Geck, B., Klemp, O., Kellermann, H.: ‘On the design of a 3D LTE antenna for automotive applications based on MID technology’. Proc. 2013 European Microwave Conf. (EuMC), Nuremberg, Germany, October 2013, pp. 640–643.
-
5)
-
6. Adams, J.J., Slimmer, S.C., Malkowski, T.F., Duoss, E.B., Lewis, J.A., Bernhard, J.T.: ‘Comparison of spherical antennas fabricated via conformal printing: helix, meanderline, and hybrid designs’, IEEE Antennas Wirel. Propag. Lett., 2011, 10, pp. 1425–1428 (doi: 10.1109/LAWP.2011.2178999).
-
6)
-
7. Pfeiffer, C., Xu, X., Forrest, S.R., Grbic, A.: ‘Direct transfer patterning of electrically small antennas onto three-dimensionally contoured substrates’, Adv. Mater., 2012, 24, (9), pp. 1166–1170 (doi: 10.1002/adma.201104290).
-
7)
-
A.D. Yaghjian ,
S.R. Best
.
Impedance, bandwidth, and Q of antennas.
IEEE Trans. Antennas Propag.
,
4 ,
1298 -
1324
-
8)
-
L.J. Chu
.
Physical limitations of omni-directional antennas.
J. Appl. Phys.
,
1163 -
1175
-
9)
-
7. Yaghjian, A.D., Stuart, H.R.: ‘Lower bounds on the Q of electrically small dipole antennas’, IEEE Trans Antennas Propag., 2010, 58, (10), pp. 3114–3121 (doi: 10.1109/TAP.2010.2055790).
-
10)
-
8. Ahn, B.Y., Duoss, E.B., Motala, M.J., Guo, X., Park, S.-I., Xiong, Y., Yoon, J., Nuzzo, R.G., Rogers, J.A., Lewis, J.A.: ‘Omnidirectional printing of flexible, stretchable, and spanning silver microelectrodes’, Science, 2009, 323, (5921), pp. 1590–1593 (doi: 10.1126/science.1168375).
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