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All Journal Indonesian Journal of Urology Jurnal Elektronika dan Telekomunikasi
Daniel Simanjuntak, Daniel
Department of Urology, Faculty of Medicine/Padjajaran University, Hasan Sadikin General Hospital, Bandung.
Electrical & Electronics Engineering Engineering Health Professions Medicine & Pharmacology Public Health

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Perancangan Quadband BPF dengan Komponen Lumpeduntuk Sistem m-BWA Wibisono, Gunawan; Simanjuntak, Daniel; Kurniawan, Taufiq Alif
Jurnal Elektronika dan Telekomunikasi Vol 13, No 2 (2013)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (626.254 KB) | DOI: 10.14203/jet.v13.47-54

Abstract

Ada banyak teknologi mobile broadband wireless access (m-BWA) yang saat ini digunakan, agar bisa mencakup seluruh teknologi m-BWA yang ada dalam sebuah perangkat maka diperlukan teknologi multiband . Salah satu komponen penting yang mendukung perkembangan teknologi m-BWA adalah bandpass filter (BPF), yang berfungsi untuk memilah-milah dan mengisolasi band yang spesifik dari interferensi pada transceiver radio frequency (RF). Pada penelitian ini akan dirancang quadband BPF yang beroperasi pada frekuensi tengah 950 MHz dan 1,85 GHz untuk aplikasi GSM, 2,35 GHz untuk aplikasi WiMAX, dan 2,65 GHz untuk aplikasi LTE secara simultan. Rangkaian quadband BPF dibangun dan dikembangkan dari konsep dualband BPF dengan menambahkan sejumlah cross coupling pada inductive coupling BPF tersebut untuk menghasilkan zero pada frekuensi tertentu yang diharapkan menggunakan komponen lumped. BPF yang dirancang memiliki spesifikasi, input return loss (S11) < -10 dB, insertion loss (S21) > -3 dB, dan voltage standing wave ratio (VSWR) antara 1 – 2, dan group delay kurang dari 10 ns. Perancangan dilakukan menggunakan perangkat lunak Advance Design System (ADS) dan kemudian difabrikasi berbasis printed circuit board (PCB). Hasil simulasi BPF menunjukkan kinerja quadband BPF memenuhi kriteria perancangan sedangkan hasil fabrikasi mengalami pergeseran.
CUT-OFF POINT OF PSA AND PSA DENSITY IN PROSTATE CANCER SUSPECTED PATIENTS Simanjuntak, Daniel; Safriadi, Ferry
Indonesian Journal of Urology Vol 23 No 1 (2016)
Publisher : Indonesian Urological Association

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32421/juri.v23i1.203

Abstract

Objective: In Hasan Sadikin General Hospital Bandung prostate biopsy is recommended for patients with prostate specific antigen (PSA) levels above 10 ng/mL or PSA density (PSAD) above 0.15 if PSA in between 4–10 ng/mL. However, there were other factors beside of prostate cancer (PCa) that could influence PSA value, such as racial differences and prostatitis. Thus, the optimal cut-off point for PSA is still debatable in national level. This research aimed to determine PSA and PSAD cut-off point for patient suspected of PCa in Hasan Sadikin Hospital Bandung. Material & Methods: A total of 502 patients underwent prostate biopsy for suspicion PCa from 2010–2014. The cut-off point of PSA and PSAD is generated from receiver operating characteristic (ROC) curve. Results: The cut-off point for PSA was 14.6 ng/mL (sensitivity 81.4%, specificity 29.8%). The cut-off point for PSAD was 0.23 (sensitivity 81.4%, specificity 34.8%). Positive predictive value (PPV) for this new cut-off point of PSA and PSAD were 41.1% and 37.6% respectively. Conclusion: PSA and PSAD cut-off point for patients in our center was 14.6 ng/mL and 0.23 respectively. This value is relatively higher compared to the Indonesian consensus. The difference might occur due to high rate of urinary tract infection in patients attending Hasan Sadikin General Hospital Bandung.
Co-Authors Ferry Safriadi Gunawan Wibisono Kurniawan, Taufiq Alif