Abstract
In this article, a new 3 dB branch line hybrid, using an asymmetric defected ground structure (DGS) microstrip, is proposed. The proposed branch line coupler suppresses the second and third harmonic components effectively. If transmission lines having an arbitrary electrical length are connected at the through and coupled ports of the DGS branch line hybrid, then the DGS branch line hybrid is operated as an impedance transforming tuner. A new DGS λ/4 bias line that can suppress high frequency harmonics as well as low frequency intermodulation is also proposed. With the harmonic termination tuner, using the proposed hybrid and the harmonic blocking bias line, the second and third harmonic components of the fabricated IMT-2000 band amplifier were suppressed by up to 25 and 27 dB, respectively. A harmonic load-pull measurement setup for an amplifier can easily be implemented with the proposed circuits.
| Original language | English |
|---|---|
| Pages | 84-92 |
| Number of pages | 9 |
| Volume | 49 |
| No | 4 |
| Specialist publication | Microwave Journal |
| State | Published - 2006.04 |
Quacquarelli Symonds(QS) Subject Topics
- Engineering - Electrical & Electronic
- Engineering - Petroleum
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