Triple-Band Dual-Polarized SIW Cavity-Backed Differential Slot Antenna

Srivastava, Gaurav; Mohan, Akhilesh; Bhattacharya, Amitabha

doi:10.1109/lawp.2021.3120374

Cited by 4 publications

(3 citation statements)

References 29 publications

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“… 5 , a dual-band antenna array has been designed by using a quarter-mode SIW cavity. A triple-band dual-polarized antenna has been realized based on a SIW square cavity 6 . In Ref.…”

Section: Introductionmentioning

confidence: 99%

Microfluidically frequency-reconfigurable compact self-quadruplexing tunable antenna with high isolation based on substrate integrated waveguide

Barik,

Koziel

2024

Sci Rep

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This communication presents a novel concept of microfluidically frequency-reconfigurable self-quadruplexing tunable antenna for quad-band applications. At the initial design stage, a substrate-integrated square cavity is divided into four unequal quarter-mode cavity resonators by inserting an X-shaped slot on the top surface of the cavity. Applying four 50-Ω microstrip feed-lines to these four quarter-mode cavity resonators enables quad-band operation with self-quadruplexing capabilities. The feed lines are organized orthogonally and off-center, which leads to port isolation greater than 32.3 dB. An equivalent network model is developed to validate the proposed antenna. To realize frequency reconfigurability, two microfluidic channels corresponding to each port are created by engraving the bottom surface of the cavity. To create a reconfigurable self-quadruplexing antenna, the channels are either filled with air or dielectric liquids of higher permittivity, so that the design offers independent tunability of the operating frequencies. As a proof of concept, the prototype of a self-quadruplexing tunable antenna is fabricated and validated through measurements. The antenna prototype occupies a footprint area of 0.37λg2. The design exhibits frequency tuning ranges of 350 MHz (8.3%), 500 MHz (10.3%), 610 MHz (11.2%), and 845 MHz (14.1%) for the first, second, third, and fourth operating bands, respectively. In all bands and across the entire tuning range, the realized gains of the designed antenna exceed 4.05 dBi. The electromagnetic modeling responses agree extremely well with the measured characteristics.

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“… 5 , a dual-band antenna array has been designed by using a quarter-mode SIW cavity. A triple-band dual-polarized antenna has been realized based on a SIW square cavity 6 . In Ref.…”

Section: Introductionmentioning

confidence: 99%

Microfluidically frequency-reconfigurable compact self-quadruplexing tunable antenna with high isolation based on substrate integrated waveguide

Barik,

Koziel

2024

Sci Rep

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“…However, these antennas usually consist of multiple layer substrates, resulting in complex processing and high cost. In [8][9][10][11][12], when the E-fields in the cavity are odd symmetric about the symmetry plane, the CM signal is inconsistent with the cavity so that the CM signal can be suppressed. The whole cavities are utilized, causing those antennas larger.…”

Section: Introductionmentioning

confidence: 99%

“…The design methods of differential antenna include microstrip-slot coupling [4][5][6], SIW equivalent wall [7], and SIW cavity odd-symmetric high-order mode [8][9][10][11][12]. In [4][5][6], U-shaped microstrip-slot differential feeding structures with unbalanced outport are applied to suppress the CM signal.…”

Section: Introductionmentioning

confidence: 99%

Fundamental‐mode EMSIW for miniaturized differential antenna with high CM rejection

Sun

Chen

2023

Electronics Letters

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This letter proposes a novel miniaturization approach for differential antennas using fractional-mode substrate integrated waveguide (SIW) fundamental-mode. Symmetrically arranging dual miniaturized cavities, in-phase DM magnetic currents are constructed to superimpose differential-mode (DM) E-fields for enhanced radiation while simultaneously constructing reverse common-mode (CM) magnetic currents to cancel the CM E-fields and suppress the CM signal. Three kinds of eighth-mode SIW differential antennas with boundary symmetry are designed to verify the approach. Analysis of the equivalent circuit models reveals that the DM resonant frequency is lower than the CM resonant frequency, effectively suppressing CM signal within the DM passband through impedance mismatch reflection and radiation E-fields cancellation. The measured and simulated results show good agreement. The size of the miniaturized antenna is 0.46×0.42×0.012 λ 3 0 , with a high CM rejection of 31.4 dB achieved.

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