Manufacturing and characterization of antennae array for W band

Primele experimentări tehnologice s-au efectuat pe plachete de siliciu de mare rezistivitate orientate <100>  avand grosimea de 400 μm. Au fost fabricate structuri de test de antene atat de tip Yagi-Uda cu patern de radiatie endfire cat si matrici de antene slot foldat

(a)                                                                   (b)

(a) Imagine foto din spatele plachetei pentru o antena Yagi pe membrana dielectrica subtire fabricata prin corodare umeda; (b) Detaliu

(a)                                                                   (b)

Imagini foto ale unei matrici de doua antene slot foldat fabricata prin corodare umeda: (a) vedere din fata, dinspre partea metalizarii structurii de antena; (b) vedere din spate, din directia mastii de corodare.

(a)                                                                   (b)

Imagini foto ale unei antene Yagi suspendata pe membrana dielectrica fabricata prin corodare uscata: (a) vedere din fata, dinspre partea metalizarii structurii de antena; (b) vedere din spate, din directia mastii de corodare

Millimeter wave characterization of the folded slot array antennae

Experimental set-up for the antenna array characterisation

Pattern radiation of the antenna array smanufactured on thin dielectric membrane at 77 GHz. There is a good directivity and low amplitude of secondary lobes.

Multidisciplinary modelling of the microwave switches in order to be integrated with the antenna elements

3D view of the electromagnetic model for the switch in OFF (a) and ON (b) state

Simmulation results (S21 and S11 parameters) for the switch structure in OFF state

Simmulation results (S21 and S11 parameters) for the switch structure in ON state

Experimental characterization of the test switch structures

           

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(b)

(c)
Actuation characteristics for three different switch  structures

(a)

(b)

(c)
S parametre measurements for different polarizations(a) without actuation; (b) 40 V actuation voltage; (c) 100V actuation voltage

S parameters determinations up to 110 GHz were performed with Karl Süss MicroTec “on wafer” characterization system having Vector Network Analyzer (VNA) ANRITSU 37397D.

Scientific papers:

• A.C.Bunea, M.Lahti, D.Neculoiu, A.Stefanescu, T.Vaha-Heikkila,  “Investigation of Substrate Integrated Waveguide in LTCC Technology for mm-Wave Applications”, Proceedings of the Asia-Pacific Microwave Conference, APMC-2011, Melbourne, Australia, 05 – 08 December 2011;
• D.Neculoiu, M.Lahti, A.C.Bunea, A.Stefanescu, T.Vaha-Heikkila“Design and Experiments of a 77 GHz Receiver in LTCC Technology”, Proceedings of the Asia-Pacific Microwave Conference, APMC-2011, Melbourne, Australia, 05 – 08 December 2011;
• A.C. Bunea, D. Neculoiu, A. Stefanescu, C. Buiculescu, A. Muller, „Investigation of Millimeter Wave Membrane Supported Structures up to 110 GHz”, Proceedings of the 34th International Semiconductor Conference, CAS 2011, Sinaia, Romania, 17-19 October 2011;