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15 GHz Bias Tee

PSPL5547 Datasheet

The PSPL5547 is a broadband, coaxial bias insertion tee and DC blocking capacitor. It was designed to have a very low cutoff frequency of only 5 kHz. It passes fast rise pulses with a minimum of waveform distortion. Its rise time is 23 ps. The frequency response is very flat, and the -3 dB bandwidth extends from 5 kHz to 15 GHz. The PSPL5547 is supplied with a 1 mH choke and terminal strip for connection to the DC bias.

Key performance specifications

5 kHz to 15 GHz
23 ps rise time
50 V, 500 mA

Typical performance

1 dB/div log plot to 20 GHz Insertion Loss

1 db/div log plot to 20 GHz Insertion Loss

5 db/div log plot to 20 GHz Return Loss

Top to bottom: 500 ps/div, 100 ps/div, and 20 ps/div. Response to 15 ps rise time input step

2.5% rho/div and 200 ps/div. 35 ps TDR of AC port

Specifications

Parameter	Symbol	Units	Minimum	Typical	Maximum	Comments
Impedance	Z	ohms		50
Upper 3 dB frequency	f_c,h	GHz	10	>15
Lower 3 dB frequency	f_c,l	kHz		5		12 kHz w/o inductor
Rise time	t_r	ps		23	35	10 – 90%
Insertion loss	S₂₁	dB		0.5
Input (AC) Return Loss	S₁₁	dB		23		f = 100 MHz
Refl. Coefficient (35 ps TDR)	Γ	%		-5		t > 200 ps
DC voltage	V	V			50
DC current	I	mA			500
Capacitance	C	μF		0.44		- 50%, + 80%
Inductance	L	mH		1.34		±30% ¹
Resistance	R	ohms		1.5
RF power	P	W			2	Average power
Isolation	S₁₃	dB		30
DC path bandwidth	f_c,DC	kHz		6
RF Connectors	SMA jacks (f)
DC Connector	Solder pin
Warranty	One Year

Mechanical dimensions

¹A 1 mH choke is supplied with the bias tee. It is to be wired in series directly to the DC in solder terminal on the coax module. This is a high impedance point. Avoid using long wire, especially coax, for this connection. Do not locate the choke close to ground. Excessive stray capacitance will cause a resonance that will appear as a dip in the insertion loss between 1 and 10 MHz

Ordering information

Models

PSPL5547: BIAS TEE, 15 GHz, 50 V

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