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| Content Provider | IET Digital Library |
|---|---|
| Author | Duan, Zhu Xu, Li jie |
| Abstract | A novel capsule antenna with dual-band performance and small occupation of inner capsule space is proposed. The antenna is designed by combining rigid Rogers substrate with flexible polyimide, which takes full utilisation of capsule inner surface and the system ground for implanted electronics. The antenna structure is based on two identical orthogonal strips, each connected with one conformal L-strip. In addition, a shorting pin is introduced, bringing in a fundamental resonance at 1.4 GHz industrial, scientific and medical (ISM) band with linear polarisation. Besides, with the adoption of the shorting pin, two extra resonant modes are excited and split in higher band, generating two orthogonal electric fields with equal amplitude and π/2 phase difference; therefore, covering another ISM band at 2.45 GHz with circular polarisation property. Finally, the simulation results show a wide impedance bandwidth of 16.2% at 1.4 GHz ISM band (for ∣S 11∣ <−10 dB), and a broad axial ratio (AR) bandwidth of 34.8% at 2.45 GHz ISM band (for ∣S 11∣ < −10 dB and AR <3 dB), with dual-band operation further validated by measurement result. |
| Starting Page | 1090 |
| Ending Page | 1092 |
| Page Count | 3 |
| ISSN | 00135194 |
| Volume Number | 53 |
| e-ISSN | 1350911X |
| Issue Number | Issue 16, Aug (2017) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/el/53/16 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/el.2017.1681 |
| Journal | Electronics Letters |
| Publisher Date | 2017-06-21 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Biomedical Electronics Broad Axial Ratio Capsule Inner Surface Utilisation Circular Polarisation Property Dual-band Capsule Antenna Dual-band Implantable Antenna Electromagnetic Wave Polarisation Flexible Polyimide Frequency 1.4 GHz Frequency 2.45 GHz Identical Orthogonal Strip Implanted Electronics Industrial Scientific And Medical Band Ingestible Capsule Application Inner Capsule Space Occupation ISM Band Linear Polarisation Multifrequency Antenna One Conformal L-strip Orthogonal Electric Field Generation Orthotics Polymer Prosthetics Prosthetics And Other Practical Application Rigid Rogers Substrate Shorting Pin Adoption Single Antenna UHF Antenna Π-2 Phase Difference |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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