Dr. Photos Vryonides | Home Page | s.nikolaou@frederick.ac.cy

Dr. Photos Vryonides joined the Electrical Engineering Department of Frederick University in February 2003 and is currently holding the lecturer post. Dr Photos Vryonides entered UMIST in 1995. After graduating he progressed to do an Mphil and a PhD in Microwave Engineering. He finished his studies in 2002.Dr. Vryonides teaches subjects related to communications, and electronics. Dr Vryonides primary research interests involve the following: Design and technology of advanced heterojunction microwave devices and circuits Microwave Electronics, in particular amplifiers and oscillators Phase Noise Characterisation and Prediction of Microwave and MM Wave Low Noise Oscillators. Satellite Remote Sensing

Journal Publications

1

P.  Vryonides,  S. Nikolaou,  S. Kim, M. Tentzeris “Dual- mode reconfigurable bandpass filter using PIN diodes”, International  Journal  of  Microwave  and  Wireless  Technologies,  DOI: http://dx.doi.org/10.1017/S1759078714000932,June 2014. 

2

P. Vryonides, H. Haralambous, “Comparison of COSMIC measurementswith the IRI-2007 model over the  eastern Mediterranean region”, Journal of Advanced Research, Volume 4, Issue 3, May 2013, Pages 297-301.

3

Hadjimitsis D.G Toulios L.,  Vryonides P, Papadopoulos  P, Lazakidou A and Clayton C.R.I,  “Satellite  Remote Sensing for water quality assessment and monitoring-an overview on current concepts, deficits  and future tasks’’, WSEAS Transactions of Signal Processing Issue 1, Vol. 3 pp 67-71 Jan 2007

Conference Publications

1

M. Ali Babar Abbasi, P. Vryonides, S. Nikolaou, "Humidity Sensor Devices using EDOT:PSS", Accepted  for IEEE APS Symposium, Vancouver, Canada, 2015

2

S. Arain, M. Ali Babar Abassi, S. Nikolaou, and  P. Vryonides, "A Reconfigurable Bandpass to Bandstop Filter Using PIN Diodes Based on the Square Ring Resonator", Accepted for PIERS Conference, Prague, Czech Republic, July 2015

3

 M. Ali Babar Abbasi, S. Arain,  P. Vryonides, and S. Nikolaou, "Design and optimization of miniaturized dual-band  implantable  antenna  for  MICS  and  ISM  bands"  Accepted  for  PIERS  Conference,  Prague, Czech Republic, July 2015

4

H  Haralambous,  P  Vryonides “HF  interference  temporal  and  spectral  characteristics  over  the  eastern Mediterranean”, 10th Communications International Conference, in Bucharest, Romania May 2014

5

H Haralambous,  P Vryonides, T.Leontiou, “Comparison of reconstructed F2 layer peak parameters over Cyprus by slant TEC ingestion into the NeQuick model and manually scaled data”, European Geosciences Union General Assembly (EGU2014) Vienna April 2014

6

Haris  Haralambous,  Photos  Vryonides,  V.  Dobrica,  C.  Demetrescu,  G.  Maris,  D.  Ionescu  “IRI  STORM VALIDATION OVER EUROPE,” European Geosciences Union General Assembly (EGU2014) Vienna April 2014.

7

H  Haralambous,  P  Vryonides, “A  comparison  between  automatically  and  manually  scaled ionospheric characteristics over Cyprus from 2009 to 2012,” International Association of Geomagnetism and Aeronomy IAGA 12th Scientific Assembly,August 2013 Yucatan, Mexico.

8

H  Haralambous,  P  Vryonides,  T.Leontiou, “A  five  year  validation  study  of  the  IRI-STORM  modelInternational Association of Geomagnetism and Aeronomy IAGA,” 12th Scientific  Assembly, August 2013 Yucatan, Mexico.

9

H. Haralambous, L. Economou, Vryonides P, “Diurnal and seasonal variability of HF Spectral Occupancy over the eastern Mediterranean, APS/URSI Symposium,Orlando USA 2013.

10

H. Haralambous, L. Economou, H Papadopoulos,  Vryonides P, “Modelling HF Spectral Occupancy over the eastern Mediterranean, APS/URSI Symposium Orlando USA 2013.

11

H.  Haralambous,  L.  Economou,  Vryonides  P, “Monitoring  of  HF  Spectral  Occupancy  over  the  Eastern Mediterranean,” APS/URSI Symposium,Chicago 2012

12

P. Vryonides, H. Haralambous, C Tomouzos, G Pelopidas “Investigation of Ionospheric Slab Thickness and  Plasmaspheric  TEC  Using  Satellite  Measurements”,  Progress  in  Electromagnetic  Research Symposium (PIERS 2012), August 2012 Moscow.

13

P. Vryonides, “Ionospheric Behaviour over Europe driven by moderate geomagnetic Storms in 2012”, 9th European Space Weather Week (ESWW9), November 2012 Brussels.

14

Haralambous  H,  S.  Anaksagora,  L.  Economou  ,  P.  Vryonides,  “Comparison  of  GPS-derived  vTEC over  Cyprus  with  IRI-2007 XXX”  URSI  General  Assembly  and  Scientific  Symposium of  International Union of Radio Science August 2011 Istanbul.

15

P. Vryonides, H. Haralambous, M. FragoudiSpread F, “Observations during Low Solar activity over Cyprus XXX,” URSI General Assembly and Scientific Symposiumof International Union of Radio Science, August 2011 Istanbul. 

16

S.  Nikolaou,  M.  Davidovic,  and  P.  Vryonides,  "Triple  notch  UWB  antenna  controlled  by  three  types  of resonators", Proc. of IEEE AP-S Conference, Spokane, WA, USA, July 2011

17

Symeon Nikolaou, Miloš Davidović, Marija Nikolić,  Photos Vryonides,  “Resonator Type and Positioning Study for the Creation of a Potentially Reconfigurable Frequency Notch in a UWB Antenna Return Loss”, EuCAP 2011, Rome.

18

P. Vryonides, L. Economou  ,  Haralambous H, “A study of sporadic E layer characteristics over Cyprus,” Progress in Electromagnetic Research Symposium (PIERS 2011), March 2011 Marrakesh, Morocco

19

Haris  Haralambous,  Photos  Vryonides,  Lefteris  Economou,  Luigi  Ciraolo,  Ljiljana  Cander ,  “Ionospheric response to the major geomagnetic storm during maximum solar activity,” European Geosciences Union General Assembly (EGU2010), Vienna 2010.

20

Haralambous H, L. Economou  , P. Vryonides, “Comparison of foF2 values extracted from DIAS maps and  ionosonde  measurements  at  Nicosia  during  low  solar  activity,” 7th European  Space  Weather  Week (ESWW7), November 2010 Brugges.

21

H  Haralambous  ,  A.  Mahrous   ,  P  Vryonides  ,  “A  Shemis  Multi-instrument  ionospheric  disturbance detection  over  the  Eastern  Mediterranean  region,” IEEE  Geoscience  and  Remote  Sensing Symposium (IGARSS2010) pp 3541-3544 Hawaii August 2010.

22

M. D. Davidovic, S. Nikolaou,  P. Vryonides, M. Nikolic, “UWB antenna with a WiMAX frequency notch caused  by  a  novel  stepped  U  shaped  slot  that  suppresses  the  parasitic  notches”  Antennas  and Propagation Society International Symposium (APSURSI), 2010 IEEE,pp. 1-4, July 2010, Toronto

23

P.  Vryonides,  S.  Nikolaou,  H.  Haralambous  “24  GHz  Low  Phase  Noise  HBT  Dielectric  Resonator Oscillator”, Proc. of the IEEE WAMICON conference, MelbourneBeach, FL, USA, pp 1-4 April 2010.

24

M. D. Davidovic, S. Nikolaou, P. Vryonides, M. Nikolic, and B. Kolundzija, “Reconfigurable UWB Antenna Operating in Two Different Sub-bands”, Proc. of EuCAP 2010, pp 1-5,Barcelona, Spain, April 2010.

25

Haralambous H,  P. Vryonides, L. Economou  ,Papadopoulos H, “A local Total Electron Content Neural Network  model  over  Cyprus,” 4th International Symposium on Communications, Control and Signal Processing (ISCCSP  2010), March  2010  Limassol  pp  1-5.

26

S. Nikolaou, P. Vryonides, D. E. Anagnostou, M. Al-Tarifi, “Development of an Ultra Compact Dual Band Antenna on a One Cubic Centimeter (1 cm3) Surface”, Proc. of IEEE AP-S conference, Charleston, SC, USA, June 2009

27

Haralambous  H,  P.  Vryonides, L.  “Economou  First  Results  from  the  Cyprus  Digisonde”,  IET  11th International  Conference  on  Ionospheric  Radio  Systems  and  Techniques  (IRST) pp  9-13  May  2009 Edinburgh.

28

S.  Nikolaou,  B.  Kim,  P.  Vryonides,  ‘Reconfiguring  Antenna  Characteristics  using  PIN  diodes’  Proc. of EuCAP 2009, pp.3748 – 3752, Berlin, Germany, March 2009

29

H Haralambous , A. Mahrous ,  P Vryonides, A Shemis, “A Cyprus-Egypt initiative for monitoring of Ionospheric  Weather  Over  the  eastern  Mediterranean  region  IAGA,” International  Symposium  on  Solar Wind-Space Environment Interactionpp 193-196 Cairo, Egypt December 2009.

30

Haralambous H, P. Vryonides,L. Economou, “Enhancements in the critical frequency foF2 over Cyprus during a low solar activity period in the absence of pronounced geomagnetic activity,” 6th European Space Weather Week (ESWW6), November 2009 Brugges.

31

C.Damianou,  K.  Ioannides,  V.  HadjiSavas,  N.  Milonas,  A.  Couppis,  D.  Iosif,  M.  Komodromos,  P. Vryonides,‘Thermal ablation system using high intensity focused ultrasound (HIFU) and guided by MRI’, 12th World Congress of the World Federation for Ultrasound in Medicine and Biology,Sydney, Australia, 30 August – 3 September 2009

32

H  Haralambous  ,  A.  Mahrous   , P  Vryonides  ,  A  Shemis  ,  “Monitoring  of  Ionospheric  Weather  Over Cyprus  and  Egypt  first  results International  Association  of  Geomagnetism  and  Aeronomy  IAGA,” 11th Scientific Assembly, August 2009 Sopron.

33

P.  Vryonides,  S.  Nikolaou,  C.  Themistos,  M.  Komodromos  “Low  Phase  Noise  HBT  DRO”,  IEEE Mediterranean Microwave Symposium, Damascus, Syria,pp. 247-250, October 14-16, 2008

34

C.  Damianou,  K.  Ioannides,  V.  HadjiSavas,  N.  Milonas,  A.  Couppis,  D.  Iosif,  M.  Komodromos,  P. Vryonides, ‘Thermal ablation system using high intensity focused ultrasound (HIFU) guided by MRI’,  8th International Symposium on Therapeutic Ultrasound, Mineapolis, USA, September 10-13, 2008

35

S.  Nikolaou,  P.  Vryonides,  D.E.  Anagnostou,  “Dual-Band  Microstrip-Fed  Monopole  on  RO4003 Substrate”,  Proc.  of  2008  IEEE-APS  Symposium,  pp.1-4,  Digital  Object  Identifier 10.1109/APS.2008.4619886, San Diego , CA, July 2008.

36

Haralambous H, G. Dekoulis, P.  Vryonides, “Operation of a new  fully automated digisonde (DPS-4D) in Cyprus,” 12th International Symposium on Equatorial Aeronomy (ISEA12) May 2008 Crete. 

37

H Haralambous , A. Mahrous , P Vryonides, A Shemis Monitoring of Ionospheric Weather OverCyprus and Egypt  12th International Symposium on Equatorial Aeronomy (ISEA12)May2008 Crete.

38

Hadjimitsis  D.G,  Vryonides  P,  Themistokleous,  K.,  Toulios  L.,  and  Clayton  C.R.I,  “  Satellite-  derived determination  of  aerosol  optical  thickness  for  air  pollution  monitoring:  A  simplified  Algorithm”,  Fifteenth International Conference on Modelling, 6th International Conference on Air Quality Cyprus, 27-29 March2007

39

Hadjimitsis  D.G,  Vryonides  P,  Themistokleous,  K.,  Toulios  L.,  and  Clayton  C.R.I,   “  Applications  of Satellite  Remote  Sensing  &  GIS  Urban  Air-Quality  Monitoring  in  Cyprus:  Potential  Solutions  and Suggestions” ,Fifteenth International Conference onModelling, 6th International Conference on Air Quality Cyprus, 27-29 March 2007