A compact diplexer with a split-ring resonator junction

Ogbodo, Eugene A.; Wu, Yun; Callaghan, Peter; Wang, Yi

doi:10.1002/mop.30740

Cited by 11 publications

(9 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the help of a slot coupling technique, it has contributed in designing a highly compact dual‐band filtering antenna where the resonator and the antenna were coupled back to back 5 also in designing of duplexing antenna using slot coupling 6,7 . In diplexers, it has been used as a frequency distributor to service two channel filters leading to improved frequency response and miniaturization 8‐13 . Using the dual mode resonators as a distributor in diplexer designs has been popular over the years as it also contributes to the filtering poles of the individual channels.…”

Section: Introductionmentioning

confidence: 99%

A diplexer with direct coupled resonant junction

Ogbodo

Ngobigha

Obadiah

et al. 2021

Micro & Optical Tech Letters

Self Cite

View full text Add to dashboard Cite

Conventionally, diplexers are designed by connecting two filters of different frequencies using a transmission T‐line junction which acts as a distribution network serving the individual filters. Here, a novel diplexer has been proposed and designed to utilize a directly coupled resonator as the distribution network. The directly coupled resonator is designed using two square open‐loop resonators of the same resonant frequency of 1.95 GHz. Coupling of the two resonators is achieved using a λ/4 transmission line to directly couple them. This process made the resonator pair to possess a dual‐mode resonator function, resonating at 1.85 and 2.05 GHz. Two bandpass filters are then designed in the corresponding modes of the resonator pair with 5% fractional bandwidth and coupled accordingly. This technique allowed the resonator pair to contribute to the resonant poles of the diplexer while functioning as the distribution network.

show abstract

Section: Introductionmentioning

confidence: 99%

A diplexer with direct coupled resonant junction

Ogbodo

Ngobigha

Obadiah

et al. 2021

Micro & Optical Tech Letters

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recently, WEH by using a passive device called rectifying antenna (rectenna) is a possible solution to change the environmental wireless energy to a usable DC power efficiently (Arrawatia et al., 2016; Awais et al., 2017; Fakharian, 2020; Hu et al., 2019; Ogbodo et al., 2017; Shi et al., 2018). The rectenna is typically a composition of a rectifier and an antenna in which the antenna receives the ambient wireless power, and the rectifier converts it into DC power.…”

Section: Introductionmentioning

confidence: 99%

RF Energy Harvesting Using High Impedance Asymmetric Antenna Array Without Impedance Matching Network

Fakharian

2021

Radio Science

View full text Add to dashboard Cite

With the development of self-sustainable standalone, low power electronics devices in a wide range of applications, wireless energy harvesting (WEH) and wireless power transfer (WPT) have gained significant attention in the past few years (Costanzo et al., 2014; Valenta & Durgin, 2014; Visser & Vullers, 2013). WEH and WPT have become a conventional way to power the low-power electronic devices wirelessly and extend their life cycles by the battery charging/replacing and save maintenance related costs. Apart from RF energy, most of the other harvesting ambient energy such as solar, thermal and vibration are environment dependent that makes this technology more effective in critical applications such as intelligent environmental monitoring for office, healthcare, domotic, and defense etc. (Colella et al., 2016; Kuhn et al., 2015; Tran et al., 2017). Recently, WEH by using a passive device called rectifying antenna (rectenna) is a possible solution to change the environmental wireless energy to a usable DC power efficiently (

show abstract

“…The variation of power density (μW/cm 2 ) in different bands depends on the time and frequency. The wireless energy harvesting by using a passive device called rectifying antenna (rectenna) is a possible solution to change the environmental wireless energy to a usable DC power efficiently [17][18][19][20][21]. However, in most cases, the DC power is insufficient to supply an independent task.…”

Section: Introductionmentioning

confidence: 99%

A compact UWB antenna with dynamically switchable band-notched characteristic using broadband rectenna and DC-DC booster

Fakharian

2021

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

In this article, a dynamically switchable ultra-wideband (UWB) planar monopole antenna employing defected ground structure (DGS) with a folded stepped impedance resonator (SIR) that can operate as either a UWB mode or the single band-notched mode is introduced. The UWB monopole antenna contains a novel whirligig-shaped radiating patch and a chambered conductor as a partial ground plane. The switchable UWB antenna uses one PIN diode as switching elements in the DGS-SIR structure without any biasing network. When the state of diode is OFF, the planar monopole antenna changes to the UWB mode, and when the diode is turned ON, a frequency notch is created at 5–6 GHz. The state of diode is set to the “ON” state dynamically in the presence of a 5–6 GHz RF signal that is detected by using a wireless power management unit (PMU) that contains a broadband rectenna and a DC-DC passive booster. The rectenna consists of a novel cypress-shaped monopole antenna as a signal receiving part and two sub-rectifiers which are connected to a 3 dB branch-line coupler with a grounded isolation port. The antenna switches from UWB to single band-notched when an RF input signal (≥8.5 dBm) in the 5.25 GHz is sensed by the RF PMU with a conversion efficiency of 26% and DC output voltage of 0.36 V, and it fades immediately in real time when the external RF signal is eliminated. In the three-tone signals, the efficiency and input signal improvements are about 10% and −5.5 dBm in the low-power levels, especially, and so develop and enhance the performance of the dynamic reconfigurability.

show abstract

A compact diplexer with a split-ring resonator junction

Cited by 11 publications

References 16 publications

A diplexer with direct coupled resonant junction

A diplexer with direct coupled resonant junction

RF Energy Harvesting Using High Impedance Asymmetric Antenna Array Without Impedance Matching Network

A compact UWB antenna with dynamically switchable band-notched characteristic using broadband rectenna and DC-DC booster

Contact Info

Product

Resources

About