A Novel Wideband Circularly Polarized Antenna for RF Energy Harvesting in Wireless Sensor Nodes

Abstract

A novel wideband circularly polarized antenna array using sequential rotation feeding network is presented in this paper. The proposed antenna array has a relative bandwidth of 38.7% at frequencies from 5.05 GHz to 7.45 GHz with a highest gain of 12 dBi at 6 GHz. A corresponding left-handed metamaterial is designed in order to increase antenna gain without significantly affecting its polarization characteristics. The wideband circularly polarized antenna with 2.4 GHz of bandwidth is a promising solution for wireless communication system such as tracking or wireless energy harvesting from Wi-Fi signal based on IEEE 802.11ac standard or future 5G cellular. A potential application of this antenna as a receiving antenna for RF-DC device to obtain DC power for a wireless sensor node from Wi-Fi signal is shown.

Microwave antennas—An intrinsic part of RF energy harvesting systems: A contingent study about its design methodologies and state‐of‐art technologies in current scenario

“…Prior to it, complete illustration about the microwave antennas in RF energy harvesting are presented with complete design perspective. A comparative study along with performatory analysis of microwave antennas are presented in Table ; keeping intact with rectenna characteristics: operating frequency, realized gain, polarization diversity, input power levels, and RF‐to‐DC power conversion efficiency, which was not in the scope of review papers for RF energy harvesting available in the open literature. Technically, to pursue clear understanding about tradeoffs of modern RF systems; five different cases of planar antennas (monopole antennas) at different bands with reflector surfaces and integrated with rectifier circuits are designed, simulated and analyzed by using FDTD domain solver (CST microwave studio) and circuit solver (advanced design system).…”

“…The relevant theories of basic forms of antennas are available in open literature . It is further classified into high performance antennas, metamaterial antennas, CP antennas, reconfigurable antennas, and array antennas . It is a strong belief that prerequisites need to be cleared before using the implicit technique in proposed antenna models.…”

“…[107][108][109] The relevant theories of basic forms of antennas are available in open literature. 36,65,70,75,80,85,91,96,101,104,107 It is further classified into high performance antennas, [110][111][112][113]159 metamaterial antennas, [114][115][116][117][160][161][162] CP antennas, [118][119][120][121][122][123][124][125][126][127][164][165][166][167][168][169][170][171][172][173][174][175][176][177] reconfigurable antennas,…”

Rectenas para el Cosechamiento de Energía de los Sistemas de Comunicaciones en RF: Una Revisión

“…En WLAN/ISM a 2,45 GHz se obtuvo 87% a una potencia de 6,4 dBm mediante el uso de un rectificador de doble acceso [19]. Mientras que en WLAN/ ISM a 5 GHz, se obtuvo 64% a 4 dBm [20].…”

“…En la Figura 5 se observa la ganancia máxima registrada en las investigaciones revisadas, y clasificada en los distintos tipos de antenas empleadas en las rectenas. Se destaca que para obtener una ganancia máxima superior a 9 dBi se han empleado antenas con patrón de radiación direccional y que estuvieron ordenadas en arreglos de PRMA con 4 elementos [20,50,51,86] y en arreglos de PSMA con 9 elementos [100,101], obteniendo mejores resultados los primeros. Adicionalmente, se aprecia que la antena espiral [52] presentó el mayor valor de ganancia máxima, igual a 8,89 dBi, entre las antenas sin arreglos, y que para las antenas vivaldi no se reportaron sus valores de ganancia.…”