Filtering Antennas: Design Methods and Recent Developments

Mao, Chun Xu; Zhang, Yao; Zhang, Xiu Yin; Xiao, Pei; Wang, Yi; Gao, Steven

doi:10.1109/mmm.2021.3102199

Cited by 56 publications

(27 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, we can notice that despite that various EM optimization techniques have been proposed, efficient SAO frameworks are still necessary to address the increasingly emerging problems in microwave filter designs. The challenges can be found in the accurate modeling the filter design with higher dimensional variables (the number of design variables larger than 20), complex structures, i.e., cross-couplings, multiple modes, multiple bands and multiple channels and integrated filtering components, i.e., filter antenna [117], filtering amplifier [118]- [119] and so on.…”

Section: A Problem-oriented Sao Em Design Methodsmentioning

confidence: 99%

State-of-the-Art: AI-Assisted Surrogate Modeling and Optimization for Microwave Filters

Zhang

Cheng

et al. 2022

IEEE Trans. Microwave Theory Techn.

View full text Add to dashboard Cite

Microwave filters are indispensable passive devices for modern wireless communication systems. Nowadays, electromagnetic (EM) simulation-based design process is a norm for filter designs. Many EM-based design methodologies for microwave filter design have emerged in recent years to achieve efficiency, automation, and customizability. The majority of EM-based design methods exploit low-cost models (i.e., surrogates) in various forms and artificial intelligence techniques assist the surrogate modeling and optimization processes. Focusing on surrogate assisted microwave filters designs, this paper firstly analyzes the characteristic of filter design based on different design objective functions. Then, the state-of-the-art filter design methodologies are reviewed, including surrogate modeling (machine learning) methods and advanced optimization algorithms. Three essential techniques in filter designs are included: 1) Smart data sampling techniques; 2) Advanced surrogate modeling techniques. 3) Advanced optimization methods and frameworks. To achieve success and stability, they have to be tailored or combined together to achieve the specific characteristics of the microwave filters. Finally, new emerging design applications and future trends in filter design are discussed.

show abstract

Section: A Problem-oriented Sao Em Design Methodsmentioning

confidence: 99%

State-of-the-Art: AI-Assisted Surrogate Modeling and Optimization for Microwave Filters

Zhang

Cheng

et al. 2022

IEEE Trans. Microwave Theory Techn.

View full text Add to dashboard Cite

show abstract

“…In addition to the defined technological aspects (such as provided by PCB, SIW or GWG) and suitable electromagnetic operation, devices for modern wireless systems must fulfill other requirements such as low cost, space restrictions, energy efficiency and mechanical robustness. Antenna engineering has long been developing the concept of filtering antenna (also called filtenna) [ 12 , 13 ]. These devices consist in the integration of filters together with the radiating elements so that the resulting device simultaneously performs the functions of filtering and radiation [ 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…Antenna engineering has long been developing the concept of filtering antenna (also called filtenna) [ 12 , 13 ]. These devices consist in the integration of filters together with the radiating elements so that the resulting device simultaneously performs the functions of filtering and radiation [ 12 ]. The main advantage that these systems have is that they eliminate the filter as an independent element, saving space in the device and improving energy efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…For all these reasons, filtering antennas have attracted extensive research efforts. Many types of these kinds of antennas and their design methods have been reported in the state of the art [ 12 , 13 ], including also the possibility of making them reconfigurable [ 14 ]. We are going to group a set of filtering antenna designs into four methodologies, the first three correspond to typical approaches and the fourth to more recent techniques.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Inverted Microstrip Gap Waveguide Filtering Antenna Based on Coplanar EBG Resonators

Inclan-Sanchez

2022

Sensors

View full text Add to dashboard Cite

A new simple design of an inverted microstrip Gap Waveguide filtering antenna integrated with two stopband filters is proposed in this work. In order to simultaneously provide filtering and radiating functions, we use the direct integration approach to cascade two periodic sets of coplanar coupled EBG resonators with a slot antenna. The analysis shows that the filters can be easily adjusted in the same feeding layer of the antenna, without extra circuitry and without modifying the lines. EBG-filters are compact and offer great flexibility in determining the frequency, width and selectivity of the rejected bands. Experimental results for an X-band filtering antenna prototype are provided showing a 7.3% transmission band centered at 10.2 GHz and a realized gain peak of 2.1 dBi. The measurements demonstrate the filtering capability of the proposed antenna, achieving rejection levels greater than 12 dB and 20 dB for the bands below and above the operation band. The proposed low-complexity design offers good performance as a filter and as an antenna, showing the essential advantages of the Gap Waveguide Technology, including low losses, self-packaging and limited cost. This work demonstrates the possibility of integrating the new coplanar EBG-filters into future Gap Waveguide antenna designs to avoid unwanted radiation, to reduce interfering signals or to provide high isolation in multiband systems.

show abstract

“…Filters and antennas are the significant components in any radio frequency front-end system. Proper integration of these two can considerably increase the selective band of frequencies, gain stability, unwanted band rejection, and system efficiency [1]. Researchers achieved good frequency selectivity, efficiency, and a wide bandwidth by using integrated filter designs and antennas [2,3].…”

Section: Introductionmentioning

confidence: 99%

Dual-Band Siw Slot Array Filtering Antenna for X and Ku Band Applications

Maruti¹,

Kishore²

2022

PIER Letters

View full text Add to dashboard Cite

In this work, a substrate integrated waveguide slot array filtering antenna for dual band applications is presented. This novel design performs the functions of both a filter and an antenna simultaneously. The main intention of this work is to design a circuit that separates the frequencies in a dual band operation. The antenna is designed as an integration of two parts; the upper part operates at 10.2 GHz while the lower part operates at 16.4 GHz. In each part, an array of five longitudinal slots is incorporated, as well as a SIW antenna with complementary split ring resonators that operate as a band pass filter at the front end. Each slot array antenna is designed for a specific frequency band, and its function depends upon its preceding band pass filter. The two band pass filters allow only signals from the frequency bands for which they are designed to their corresponding slot array antennas. This technique, along with properly spaced metal vias of the SIW antenna, prevents any leakage and hence reduces interference in dual band operation. Both the band pass filter and the antenna can be built on the same planar board. The antenna is fed through a microstrip to SIW taper transition. CST Microwave Studio software is used for optimization and simulation of the structure. The antenna was built on an RT Duroid 5880 and tested to investigate practical validation. The antenna has a bandwidth of 1.9 GHz, from 9.2 GHz to 11.1 GHz in the X-band, and 2.2 GHz, from 15.6 GHz to 16.9 GHz in the Ku band. The gain pattern is unidirectional in nature and has low side lobe levels of −24 dB and −21 dB at resonant frequencies. A noticeable difference that is greater than 20 dB between co-polarization and cross-polarization is observed. The dimensions of the antenna are 56 mm × 32 mm × 0.508 mm. There is an excellent similarity between the simulated and measured results.

show abstract

Filtering Antennas: Design Methods and Recent Developments

Cited by 56 publications

References 63 publications

State-of-the-Art: AI-Assisted Surrogate Modeling and Optimization for Microwave Filters

State-of-the-Art: AI-Assisted Surrogate Modeling and Optimization for Microwave Filters

Inverted Microstrip Gap Waveguide Filtering Antenna Based on Coplanar EBG Resonators

Dual-Band Siw Slot Array Filtering Antenna for X and Ku Band Applications

Contact Info

Product

Resources

About